He tries not to, but caves in anyway

No, he couldn't do that to her.

Andrew groaned "I don't know if that's such-" he started, but Katie interrupted him.

"Just for one day!" she said.

"That's not really the prob-"

"I'll wash it really well when I'm done!"

"It just isn-"

"Please! I'm just really curious! I can't go out and get one myself; I'd die if my roommate ever found it! Just one day!"

"Katie, can't you just use a hairbrush or som-" this time Andrew stopped himself when he saw how dejected Katie looked.

"It just wouldn't be the same; I want something realistic." Katie sighed. "The truth is, I don't know who or what I like, and a plastic brush handle is not going to give me any answers. Something like what you have there," she motioned to the dick in Andrew's hand, "might tell me something about what I'm feeling. I'm still a... a virgin. I've never been with either a guy or a girl; I'm too shy and too busy to try... I just thought that maybe I'd finally have a chance to have some idea of what it's like to be... er... full. I guess not."

Fuck. Andrew couldn't just say no after his friend confided in him like that. He knew he shouldn't let her borrow his cock, but he also couldn't tell her off. "Fine," he finally responded, holding his hand out with his dick served up on it.

Katie looked up and her face began to glow with joy. "Are you sure?" she asked.

Andrew wanted to say no, he wanted to take it back, but he couldn't now. He nodded his head and faked a smile. Katie took his cock from him and held it in her wonderfully soft hands. "It's warmer than I thought it would be; I hadn't noticed before," she remarked. She played with it a little before saying "It's so soft. Well, it's hard, but the material is really like velvety." She kept stroking it in awe.

Andrew felt his balls churning, and was afraid of what would happen if she continued right now. "N-not here, please," he stammered.

"Sorry! Right, let me just put this away." Katie opened her purse and attempted to tuck it into one of the pockets unsuccessfully. "How do you... umm... get it to be small again?" she asked.

"It just... ah... turns itself off after a while."