Penile Expansion Gene Therapy

"Please...," was all she could say, motioning for me to continue.

I grabbed her pants by the waistband and carefully removed them, along with her satin panties. Her perfect pink vulva finally came into view, glistening with arousal. As I moved my face towards her I was greeted by the sweet smell of her sex for the first time.

She tasted even better than she smelled as I planted my open mouth on her labia, kissing her lips passionately. The flavor was light and pleasant, like the aroma of wild flowers. She groaned softly and continued to massage her supple breasts. Performing cunnilingus on a perfectly smooth, hairless pussy is an amazing experience. It was almost like her lips were kissing me back, massaging my own lips and tongue. Everything was just so slick and soft. I wanted to drink her in forever.

As I gently licked up and down her slit, it soon became very apparent that she was getting highly aroused. Her engorged clit was now visibly sticking out of its hood and it was extremely easy to lick it on all sides and bring it into my mouth to gently suckle. Soon her body indicated that she wanted more and I began to lick her clit more hungrily. I decided to give her everything I had, to use every trick in the book I had learned to show her my love for her in that moment.

I then inserted two fingers into her pussy and was very surprised at how different her vagina felt than Lauren's. While Lauren's walls had a king of rough texture, Dr. Shelby's were slick and impossibly soft. She also seemed considerably looser, especially the further in I went. Maybe she was just so turned on. I quickly found her gspot, which felt just a bit spongier than the rest of the tissue and began to gently massage it while sucking and licking on her clit with my mouth.

In a matter of seconds she began to climax. At first I wasn't sure that she was coming because she actually got quieter. Her moans ceased and her whole body froze. But my fingers inside her pussy told me that she was indeed experiencing an amazing orgasm. The walls of her vagina began contracting around my fingers so hard that I don't think I could have pulled them out if I wanted to. The contractions occurred about once per second and were accompanied by rhythmic clenching of her abdominal muscles. Her torso alternated between displaying a subtle six pack when she flexed, to a sucked in flat tummy below her prominent little ribcage. This lasted for maybe 15 seconds and was absolutely the hottest orgasm I had seen any girl have.

After she finally relaxed a bit and started breathing normally again, I thought she would want to stop. I pulled my mouth and away and withdrew my fingers from her slick hole to let her recover. But she immediately cried out, "No, don't stop!"

So I instantly went back to what I had been doing previously. In another 40 seconds or so, she was climaxing again. This cycle continued for I believe four more orgasms all in the span of just five minutes. It could have been more though, as sometimes I thought she was coming down from one only for it to ramp back up again.

After the fifth orgasm (at least) in a row, I don't think she was entirely satisfied, but my tongue and forearm muscles were pretty shot. I pulled away, slightly out of breath and just smiled up at her.

She finally relaxed her whole body against the couch, exhausted."Oh my! You are amazing!" Then she leaned over and grabbed the back of my head, pulling me up to her mouth for a kiss. For a split second I thought about how Lauren always hated when I kissed her with her wetness all over my mouth. But Dr. Shelby didn't seem to care about that at all as she hungrily began to make out with me. I actually think she was turned on by the taste of her pussy on me as she spent extra time licking the juices off my tired lips.

After we broke off our kiss I looked down at her body and chuckled. "We need to get you cleaned up," I informed her, realizing how much of a mess she was. Her pony tail had somehow come completely undone and her blonde hair was totally messed up, sweat causing it to cling to her forehead and temples. A still massive amount of semen was caked to her entire upper body and was probably beginning to dry in some places. And her whole pussy area and inner thighs were soaked with a mixture of my spit and her natural lubricant. She was quite the mess, but I had never thought a girl looked hotter!

She smiled back at me. "Is it OK if I use your shower?"

"Only if I can join you," I answered.

She giggled, then pointed down at my crotch. "Hey look."

I looked down and was relieved to see that my erection had almost entirely subsided. The head had returned to its protective foreskin and the entire length had drawn itself up to where it hung down only a few inches.

"Awesome," I said back to her.

***

After carefully walking to the bathroom, making sure not to let our bodily fluids spill all over my floor, I reached into the shower and turned on the water. As I turned back towards the center of the room, Dr. Shelby firmly wrapped her arms around me and drew me in for another warm embrace. We kissed passionately while she squeezed her gigantic cum soaked boobs against my abdomen. Even though I was fairly satisfied sexually, it was still a very arousing feeling. As I held her body against mine I couldn't help but notice her nipples gently pressing into me. I eventually reached down and grabbed her small but firm ass, eliciting a cute giggle. We were enjoying ourselves immensely.

What followed was the most intimate and erotic bathing experience I could imagine. We stepped into the steaming hot shower and proceeded to wash every inch of each other's bodies. I carefully lifted each breast and rubbed a bar of soap around the slight sag. I gently washed every fold of her skin between her legs, always letting my fingers linger slightly whenever I brushed her clit. Dr. Shelby also thoroughly washed every molecule of my cock, sliding the foreskin back to clean around the head. She washed my balls and taint, and expertly cleaned all of the lube from my sensitive anus.

Every minute or so, we would take a brief pause from our cleaning to kiss each other. Sometimes these were sweet with just a gentle brush of our lips. Other times, they were full on passionate with open mouths and tongues involved. My favorite came when she turned around and pushed her ass back so that my cock slid between her small cheeks. Still holding on with one hand, she began to slide my head up and down her crack, grinding back against me. She then arched her back and reached up with her other hand to grab the back of my head to pull me in for the passionate kiss.

I put my arms around her, pulling her even more tightly against me. One of my hands found a breast and began to massage the skin, slick with soap. The other went to her clit, using gentle pressure to pull her ass into me even more firmly. It was an indescribably amazing feeling, both from a physical and emotional standpoint. I was very surprised to find that even though the pleasure her hand and ass was providing my cock was immense, I seemed to show no sign of regaining my erection. Dr. Shelby did not seem to mind though as we stayed locked in that intimate embrace for at least a minute.

After our shower, the hour was very late. As we dried off together we just could not keep from smiling at each other.

"I know it is really late, but I just don't want to leave you. I am having such a great time," she finally said.

"Do you want to stay over?" I asked.

"Would that be OK? I know you are just coming off of a relationship and I don't want it to feel like I'm taking advantage of you. And of course I know I am being super inappropriate being your doctor and all but..... but I have needs you know," she said laughing. "I have been so caught up in my work, I think it has been over a year since I spent the night with a man."

"Really?" I responded, somewhat taken aback. This cute, sexy, and very smart young women should have had guys clamoring for her attention.

"Yes," she answered, eyeing my large soft dick as she nodded her head.

At that point it occurred to me just how horny she still was. This beautiful woman wanted my dick badly. Was she licking her lips while she stared at me? My ego had never felt so great. A huge grin subconsciously spread across my whole face.

Suddenly Dr. Shelby looked away and put her face, flushed with embarrassment in her hands. She had realized that I caught her staring at me lustfully.

"I'm sorry," she cried out. "You must think I am a so shallow."

"No..." was all I managed to say before she continued.

"I mean, you do have a perfect cock now. What girl wouldn't want to sleep with you? But I promise, it's not just that. I really do like you and not just this," she said grabbing my soft dick while looking me in the eye.

"It's OK. believe you," I said, trying to diminish her concerns. "I like you to."

"Do you really?"

"Of course," I responded. You are a wonderful person. You have been so great to me.

After a brief pause, she said, "But do you find me attractive, physically."

"What?" I said, shocked that she could even ask that. Did she not know how hot she was? "Of course I am attracted to you!"

"Well... it's just that we have been kissing quite a bit I have been touching you down there a lot and you didn't get an hard again."

"Well," I started to respond. "I actually don't know why I haven't gotten hard again. I definitely want you. Maybe I am just tired."

"Tired," she repeated. "Yes, maybe that is it. We should get some sleep."

We then finished drying off and climbed into my bed. After getting comfy she pulled my head to hers again and kissed me deeply. After finally breaking the kiss, she whispered, "By the way, it's Sam."

"What?" I said.

"My name.... It's Samantha really but I usually go by Sam."

"It's nice to meet you Sam," I said, before happily drifting off to sleep with her head resting against my chest.

***

I awoke to a somewhat familiar feeling of wonderful physical pleasure in my genital region. Momentarily forgetting the events of the previous day, my mind quickly made sense of the situation by imagining that Lauren was sucking my dick. It felt amazing and I reached down to rub her body lying next to me, quietly moaning to show my appreciation. As my hand crept over the side of her small body, the flesh became super soft as I cupped her enormous breast. What the? Lauren didn't have breasts like that!

I suddenly jolted more awake, realizing that it was Dr. Shelby.... or Sam I remembered, who was sucking me softly. My body jerked a little as I awoke and she giggled, taking my cock out of her mouth. Then she climbed down between my legs, spreading them apart before pushing my entire wet dick back in her mouth. Though it felt amazing, I realized that I was still soft because she was able to fit almost the whole thing. Any time Lauren had sucked me while soft, I had gotten hard in just a few seconds so I never got to enjoy the different sensations it provided.

But Sam it seemed was becoming more and more intent on bringing me to an erection as she started to grip the base with one hand while massaging my taint with her other. In between her fervent sucking and licking she began to say things like, "Come on baby.... get hard for me."

After a few minutes of this, I couldn't help but laugh at her enthusiasm, causing her to stop and look up at me with a look of slight disappointment.

"I am sorry, but I really have to experience this inside me," she said with a bit of a frustrated tone in her voice. She then went back to sucking and stroking. Her efforts felt absolutely amazing, but still my cock remained completely soft. I began to flex my PC muscles, trying to force blood into the shaft, but no success was to be found. Frustration began to slowly well up inside me as well. What if my new dick was too big to get hard? I had of course achieved and maintained an impressive erection the day before, but I hadn't ejaculated in almost a month. Is that what it was going to take?

Sam likely felt my growing frustration because she momentarily halted her efforts and climbed up my body to kiss me, while still fondling my tool with her strong hand.

"Don't you want to fuck me?" she said staring passionately into my eyes.

I nodded. "Yes... but I can't..."

"Just relax baby. We will get you hard." she said calmly. "You responded to anal stimulation nicely yesterday, maybe we can try that again."

She then quickly got up and ran back to the front room to retrieve her bottle of lube. When she returned, she had me again stuff a towel covered pillow beneath my ass so that my whole crotch stuck more up in the air giving her better access to the entire region. After putting on another glove, she proceed to lube up my hole while she stretched my soft dick upwards so that it would be out of the way. It was amazing how long my dick looked from my perspective as she stretched it to its full length. Since it wasn't hard, the shaft was pretty thin and it really had that pencil dick look to it. Good thing it filled out when I actually got hard, I thought.

When Sam had finally finished lubing me up, she moved to placed the bottle of lube on an end table, letting go of my outstretched dick. As she let go, gravity took over and caused my dick to fall, swinging downwards on one side of my balls. As the heavier head swung down, it smacked against my lubed ass hole, making a clearly audible wet slap. Sam noticed this immediately and stared at my dick with a look of total amazement.

"Oh my. You are so long!"

She quickly placed the lube on the table and climbed back in between my legs. Her horniness had momentarily subsided, being replaced with a doctor's typical anatomical curiosity.

"Do you know what you can do?"she asked intently.

"No," I responded.

"You know the expression, Go fuck yourself?" she asked laughing.

She then grabbed my balls and pushed them to one side while grasping the head of my dick firmly, pulling it straight downwards. My brief confusion at what she was planning quickly disappeared as it became clear where she was leading the tip of my cock.

As the glans made contact with my anus, my heart began to beat faster in my chest. Was this really happening? I thought to myself. She used one hand to spread my ass cheeks further apart and the other to firmly push the head against my opening. After a few moments, my hole gave way and the tip slipped inside.

Sam gasped sharply. "Oh my that is fucking hot!" She then used her fingers to push more and more of the head into my stretched opening. All of the sudden I felt a firm pop as the head completely disappeared into my ass. I was fucking myself!

The feeling was unlike anything else I had felt before. The simultaneous pleasure on my sensitive anus and glans was overwhelming. I also found that I could very easily ramp up that stimulation by multiple levels by flexing my anal muscles, squeezing my dick and massaging it at my own pleasure.

Sam also seemed to be quite excited by the whole scene in front of her as I could hear her breathing pick up as her arousal increased. She began to lick and stroke the still exposed shaft all the while keep her hand near the tip, trying to force more of my length into myself. Soon she had inserted enough of the shaft inside me that on one particular squeeze, my anal sphincter brought my head in contact with my prostate.

My pleasure now sky rocketed and very soon, a familiar swelling feeling began to take over my genital region. I was getting hard! The pulse of my heart rate began to be overwhelmingly apparent as my dick pulsed inside me. The pressure around my opening also became nearly unbearable as my large head swelled to its full size.

Soon the hardness of my dick became too much for the position it was in and on one particularly forceful contraction, my ass suddenly expelled my dick and it flew straight up smacking Sam right in the face.

"Sorry," I laughed.

"Fuck your huge!" was all she could respond with as her horniness had now taken back over her consciousness. She then replaced my cock with two of her fingers in my ass, quickly finding my prostate which she started to expertly massage. She wrapped her other fist around the base of my cock and began to stroke upwards firmly trying to coax me to a full erection.

Just as I my cock became rock hard and the head swelled to its full size, Sam's fingers inside began to feel almost too good. The feelings of an orgasm were all the sudden upon me.

"Stop, stop, stop!" I cried out, fearing that it was too late.

Sam instantly released her grip on my cock and pulled her hand away. She, however, kept skillfully massaging and milking my prostate as a steady stream of precum began to pour out of my tip. I felt as thought I was exactly on the edge of an orgasm with white hot pleasure coursing through my entire crotch and lower body, but the feeling didn't crest. It kept going and going. My muscles began to almost violently contract involuntarily as more and more precum streamed out of me and pooled on my stomach.

After what had to have been at least a minute of orgasm-level pleasure, the feeling slowly began to subside. After I relaxed back against the pillow, Sam slowly pulled her fingers out of me.

"I believe you just had a prostate orgasm, or what some call a dry orgasm. But it looks like it wasn't actually very dry at all," she laughed, rubbing the slick precum on my stomach. She then scooped up as much of it in her hand as she could and slathered it over the head of my now steel-hard cock. "Are you ready to fuck me?"

Without hesitation, I leaned up and kissed her once more passionately on the lips as she squeezed my cock, making sure it was as hard as it could get. I then threw the pillows off the bed and rolled her over on her back, grabbing her by her wrists and holding them above her head while I continued to kiss her. I had never really had the urge or confidence to take charge like this with Lauren and the feeling of power was amazing. Sam seemed to like it as well as she just stared lustfully into my eyes as her breathing picked up with anticipation.

Now completely on top of her, straddling her around her hips, I looked down at her sexy body taking in the wonderful view. She was so small everywhere, except of course for her massive pancaked breasts which spilled quite a bit to both of her sides, but still sat up firmly on her rib cage. Her ribs themselves look extremely sexy as well, rising and falling with each breath, stretching the perfect skin of her thin torso.

After making out with her for a few more seconds, stopping to admire her body between passionate kisses, I carefully began to spread her legs, slipping each of my legs one after the other in between hers. Once she was spread wide enough, I lowered myself onto her until the tip of my cock was touching the opening to her pussy. I don't know if it was her or the massive amount of precum slathered on my dick, but it felt incredibly wet, and super inviting.

Keeping both of my hands entwined with Sam's I moved them to either side of her head and looked her straight in the eyes, trying to show my passion for her. I then began to push my cock into her opening, using my PC muscles to maintain the correct angle for penetration.

As my giant cock slowly impaled her wet vagina, Sam surprisingly didn't show any signs of discomfort. She breathed heavily, obviously aroused to a considerably degree, but didn't really have much reaction other than that. She continued to stare into my eyes as if daring me to push deeper and deeper.

Her pussy felt amazing of course. It was totally different than Lauren's. Where Lauren's was tight all the way in, with the skin clinging to my shaft, Sam's pussy felt much slicker and provided much less resistance. While her opening felt very small, the inside seemed to almost balloon inside her. It also soon became apparent that she could take me in far deeper than Lauren as well.