Been lurking on this thread for a while and okay, I'll offer a bite.
Backstage after the People's Choice Awards 2 years ago I saw Matthew McConaughey's cock.
I was in the men's room when Matthew (who was roaring drunk) literally stumbled in with his boys (the only one I recognized was Cole Hauser). The awards were held at USC, and the toilets have no dividers, not that Matthew cared.
I was already uncomfortable because it felt like a bunch of frat boys had appeared. I was washing my hands while I noticed Matthew undoing his pants half-way to the urinals. There was a lot of carousing going on behind me, and while I was drying my hands with paper towels I hear a yell, "Hey! Boy!"
I looked over and there was Matthew McConaughey facing me, pants to his ankles, fully on display.
"You see that? That's a movie star's cock."
I was so uncomfortable and beside myself I didn't know what to say. So I just said, "It's very nice." And then I turned around and left, to a roar of laughter.
When I was driving home that night I called my writing partner, I was still freaked out - I've been around celebrity types a lot, but nothing like that. I kinda felt violated. I was like, "I don't even like Matthew McConaughey. I don't think I've been able to sit through a single movie of his...." I relayed the story to my writing partner... oh how I wish he was in my head when it happened... his response was, "What you should have done was drop your pants and say, 'See that? That's a struggling screenwriters cock."
Even though I'm clearly just a few years younger than him I won't even get into him calling me "boy."
And since I know I'm going to be asked: perfectly average flaccid, cut