Undersized guys are self-conscious about their size, and I'm self-conscious, embarrassed about being oversized. I haven't been to a pool, or gym, in many years, decades.
I have not been to a gym since I was required to do a physical fitness class. The instructors eventually had me get excused for the medical reason that I had to avoid injuries such as testicular torsion, strained, or bruised penis, (and other issues I don't remember right now) due to having oversized genitalia. (I got thrown out of gym class because my dick and balls are too big.)
Around age 20/21 I was invited to a friend's pool party. I didn't know there would be so many strangers when I arrived. When I stepped into the pool area there were small groups of people having various conversations. Suddenly conversations stopped while everyone caught sight of my bulge and stared. After a few seconds they went back to their conversations. Sometime later, as I was standing there, looking around, I looked downward. There was a guy sitting in a lawn chair, which made him close to being eye level with my crotch. He was staring at my crotch. I was going to look away so that if he looks up he wouldn't see that I noticed, but "oops" he looked up and we made eye contact. He was pretty cool by making a joke to admit he was looking. He pointed at my penis bulge and said, "Watch where you swing that thing, you might put my eye out." I laughed a little and joked, "I'll try to be careful."
When my buddy wanted to go to the county pool, I figured it wouldn't be too crowded because the off-season had started, it was the last days the pool would be open, and the weather wasn't very hot. There were more people than I expected. There was a group of 4 college girls, sitting together. When they caught sight of the bulge they reacted with squeals and "Oh My God, Oh my God, Oh My God!" while covering their eyes with their hands and peeking between their fingers and laughing. Guys were exclaiming, "Holy Shit!" and "Jesus Christ!" and other expletives while staring, bug-eyed, at my crotch. While I was rinsing off in the shower room. Only one other guy was there. He stared a little, then as he walked behind me to leave, he muttered, "Wow!" as he passed. I was willing to go again a week later. I otherwise liked being at the pool. I wore baggy shorts over my swimwear to make things look, (how should I say it,) less bulbous. There is a sign that says shorts are not permitted as swimwear. I figured I'd take the shorts off if they complain. The employees looked at me, definitely recognized me from the week before, and didn't say anything, I think they knew I was trying to be as discreet as possible.
So I don't want to go to any place where I'm on more "display" than usual.