There was a short silence while all the girls let their imaginations run wild.

Then Cora said, "I wonder what a cock looks like."

"I keep telling you," Lisa said. "I know just what they look like. I spied on my uncle once, in the changing rooms at a swimming pool."

"Aw, come on, Lisa," Shelly said. "You know we don't believe you. A cock can't be that big. You said it was seven inches long or something."

"Well, I thought you'd say that, smarty," Lisa replied, "so tonight I'm ready to prove it to you. Look what I saved from the cafeteria."

She produced a long fat banana. The girls stared at it.

"Wait a minute," Candy said. "You're telling us cocks are yellow?"

"No, dummy," Lisa giggled. "I'm just saying they're this size, just about the size of a banana."

"Bullshit," Shelly laughed. "Like we said before, nothing that big would go into a girl's cunt."

"Well, that's just what I'm gonna prove," Lisa said defiantly. "And I'm gonna prove it right now."

She whisked off the panties of her shortie nightie, took the banana, and walked over to her bed. There she lay on her back, bent her knees, and opened her legs. All the girls could see the moist pink flesh of her cunt.

That was no big deal. The girls saw each other naked all the time. One night they'd even compared pussies. But everybody was fascinated with Lisa's new experiment, and they came to sit around her on the other beds.

"You're gonna stick that thing inside yourself?" Cora asked, wide-eyed.

"Yes," Lisa said. "I'm gonna prove it'll work."

"Oh, wow, you've got more guts than I do, Lisa," Shelly said. "I still think you're wrong. Cocks can't be that big."

"I saw my uncle's cock," Lisa snapped. "It was this big. Anyhow, here goes."

She pressed the pointed end of the banana to the tiny virgin mouth of her cunt and started pushing. Her friends watched open-mouthed, hardly even breathing. It seemed impossible that Lisa could get the fat long banana into herself.