by kotochaos
It would help to look up the female anatomy before writing another line. Also, when does a male's organ swell during intercourse? A fuck story should contain the correct facts even if the story is fiction.
"As stimulation continues the swelling and fluid production continues to increase. The plateau continues until just before the orgasm. When orgasm begins for males the penis is most erect." https://med.libretexts.org/Courses/Chabot_College/Introduction_to_Health/05%3A_Gender_and_Sexuality/5.05%3A_The_Sexual_Response#:~:text=As%20stimulation%20continues%20the%20swelling,the%20penis%20is%20most%20erect.
Also, cervical penetration has been written about, though it is not experienced in the way that it is presented in the story, admittedly. Maybe...It's make believe?
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-KotoC.