Only maybe once. I've seen dozens of naked men from playing football and going to gym locker rooms as an adult, and most men were obviously smaller than me. I remember one who appeared to be noticeably thicker, but also noticeably shorter. But one guy who I played football with might have had me beat in both length and girth. It's hard to say, because I only ever saw him soft and he's a tiny man otherwise (only about 5'6" and probably 150 lbs with a tiny waist, I think) so it would look bigger on him, but his dick was definitely at least as big as mine. I heard from a girl who was good friends with a girl he was sleeping with that he had a 9 inch dick that she couldn't get her hands around, but you never know how accurate people are with those guesses.