Fungi

"Attracted?"

"To the point of addiction."

Cindy and Anna exchanged glances. They weren't ready to admit it, but deep inside they both knew that they were already longing for that carnal orgasmic sex...

"How far could it spread, Professor?"

He looked at them and chuckled. "I see no reason for it to stop anywhere. No reason at all. It could just take the whole world."

And they drove to the lab, carrying the sample boxes with them.