Saw a beautiful rock-hard cock at the Pittsburgh airport last year. The airport was dead and I was peeing at a urinal when a guy, probably early 20's, came up to the urinal next to me. He pulled out a really thick cock and started stroking. I stood and watched until another guy walked in. I went back in a couple minutes later and he was still rock hard, so I just enjoyed the show while he fired off a nice load.