Two stories along those lines:
(1) I once went with gay friends to a gay bar where they were having a male beauty contest ("Mr Gay Hunk" or something like that). The guys would come out on a makeshift runway. Most of them wore bathing suits or posing straps but a few went totally nude. One guy would probably have had the best build but he was about 6'5 or 6'6" which makes it harder to bulk up than it is for shorter guys. He still had a really good build. I was a little surprised because he had fairly small dick. He sported maybe a 3" slender semi. After all the models came out, the winner was determined by applause. The guy with the smallish dick came in third. The winner was an absolute knockout; there was little doubt he'd win. He looked to have a small-average cock under his suit.
Later on one of the contestants, now fully dressed, joined us. He was a nice-looking Italian (maybe Latino), dark haired, stocky good build, about 5'9". He had posed nude and had a pretty big cock, thick and hefty (though not gargantuan). The conversation turned to the contest. We all said we'd clapped for him (you could clap and shout for as many contestants as you wanted; just the total noise level counted). I mentioned that I'd also liked the tall guy. He said, "Yeah, he's really good-looking, but I think it's. . . well. . ." and stopped short. We prodded him about what he was going to say and he finally said, "Well, I don't think guys with small dicks should pose nude. I think he'd done a lot better if he'd worn a suit or something."
(2) Somewhat similar story: When I was single I went through a phase where I used hit the sex clubs a lot. I always did fairly well because of my good looks and build but, admittedly, I'd have done a lot better if I were hung better; Soft I'm really really small, just the head buried in my pubes.
One night I was chatting up this really cute chick but got aced out at the last minute by this hung dude. A friend of mine had observed the whole scene and came over to commiserate with me. "Tough luck, dude, she was really fine. . . " Then added, "Hey, don't take offense or anything, but I think this is the wrong place for guys with small dicks. . . " Probably right, but I still usually made out a lot better than a lot of guys with a lot bigger dicks.