When he turned, his cock still jutted and bounced up and down as he moved. I couldn’t take my eyes off it. It was thick and veiny, with a pink head swollen wider than his shaft. I knew from my internet inventory of cocks that he was circumcised. It was big, but not freakish like some I’d seen online. The heat returning to my belly drained away the last of my fear.

Without a word, Mark dove into the pool. I considered for about two seconds before I stripped off my shirt, shorts, and panties to jump in after him. What the hell? He’d seen most of me already and...