He tells tells Katie the truth

This was his best friend he was thinking about! He couldn't go and screw things up by letting her borrow his dick and use it like a dildo!

"I'm sorry, but you can't."

"Just for one day!" Katie said.

"I really can't."

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

"Katie," Andrew said quite seriously. "Look. I can't quite explain how, but this..." he wiggles his hand with his dick hanging out of it, "...is my penis."

Katie looked shocked. "W-What?" she looked at her own hands. "I- You- How-" she stammered. "Ew! Ew! Ew! I was holding it!" she wiped her hands on Andrew's bed.

"I know, I'm sorry!" Andrew quickly shoved it into his desk drawer. "I didn't expect you to find it and I was trying not to gross you out."

"I thought it was just a dildo! How the hell is that your dick?"

"All I know is that I did something wrong in class today, and my dick fell off. It still works just fine, but it's just not attached." Andrew was trying to remain as level-headed as possible.

"Have you tried to find a way to put it back on?" Katie asked.

"There's a magic word I can use to put it back on, but it'll come right back off with the same word."

"What's the word?"

"It's... Uhhh..." Andrew was trying to remember. "Sepliasto? Septunito? I know it starts with an S."

Katie stared at him. "You can't even remember the word?"

Andrew picked up his binder and started flipping through pages. "It was the same magic word from our class today, hold on." He skimmed through until he found today's notes. "Sectunisco!" he exclaimed triumphantly. He immediately felt the loosening sensation on his dick. He opened the drawer again to see it stuck firmly to a piece of homework.

"Ah, fuck," Andrew said, putting down the binder. "The trouble is that it sticks to whatever is closest to it when the word is said."

"What if I say sectunisco?" The pinching sensation returned and his dick flopped off of the sheet of paper.

"Shit... it seems like anyone has control over it."