SInce there's so little here on DL, let's shamelessly repost other people's anonymous first person gossip found elsewhere on the web.
Obviously, we can't vouch for other people's anonymous gossip, but don't post anything that seems entirely implausible:
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