I don't know whether this is a particularly American phenomenon or it's world-wide, but it's been true in every multi-age locker room I've ever visited, and apparently I'm not the only one who has noticed. I left, worked out, and came back 45 minutes later to find the guy still standing there in the altogether the only thing that had changed was that his previous conversation partner had managed to slip away, and he was now having an animated discussion with someone else. Not long ago I was in a locker room and saw two men talking, one of whom was a 60-ish fellow standing completely naked, holding forth on something or other. In locker rooms, there's a nearly straight-line correlation between a gentleman's age and the time he enjoys spending chatting with other people, or merely walking about, with his junk on display for all to see.
What is it with old men in the locker room? If you're a man, and you've been to a gym, or the Y, or the JCC, you know what I'm talking about.