I showed you mine, now show me yours

It was too late to take it back, so I decided to go the other direction. I really wanted to see his cock, and if I had already risked everything by pushing it this far, there was no reason to shy away now.

"So, I showed you mine, now you show me yours," I said.

"I thought you showed me yours because I had already showed you mine," Mike said.

"I thought about it and you only showed me a picture of yours," I said. "Or at least you claimed to. You weren't even in the pictures! That could have been anybody's giant cock. You could have downloaded a picture off the internet."

"Really?" he asked with a chuckle.

"Hell, I've known you my entire life and that was the first clue I'd ever gotten that you were hung like a horse?" I said. "Doesn't seem likely. I would have had some clue. Anybody with a cock that big would have to brag about it, or the girls would gossip about it at school."

"But if I pull mine out and prove you wrong, then you still owe me," Mike said. "You've already seen pictures. What do I get when you've seen proof that my cock really is that big?"

My mind was racing. He seemed interested in seeing where this was going, but how should I move forward???