It's apparently the same thing for women. Some with absolutely huge breasts go under the knife to get a breast reduction, for the reduction in back pain, shoulder pain, strange looks and unwanted comments from others, and perhaps other reasons. Others are extremely depressed and embarrassed that their breasts are what they believe to be much too small. I'm probably bigger than our daughter-in-law, and that's not saying much.
I know a lot of men who are "a man's man," who would be depressed, possibly angry, or who knows what else, if gyne struck them. I've seen a bit of that from a few here on the forum in the months I've been here. Others make the best of it and actually enjoy their breasts, like the old saying that if life gives you lemons, make lemonade. Myself, I'm still able to hide it, and for others' sake, I will, as long as I can do so without discomfort.
But look at what someone (I don't know who) thinks male models for clothing manufacturers ought to look like, or even the mannequins in the department stores: upper-body builders, must be young, must have a full head of hair, and must have a huge package, even though I would be very embarrassed to have such a package and am even embarrassed to see other men showing theirs off in public with tight pants when they ought to be dressing more modestly. I myself am a road cyclist, and I can tell you the kind of body shown in men's underwear ads is not the kind that goes fast on a bike, even if they can bench press or military press or curl a lot more than I can. So no; I don't want that kind of body. And how about hair and age? I had a tall, slim teacher in college who was an older man with very little hair but had a marvelous beard, and from the side he was one of the handsomest men I think I've ever seen.
Or look at the ads for Fathers' Day, where you see a 22-year-old man with his kids, ages 12 and down; or a man modeling a suit with other things to try to make it look like he has 40 years of experience building businesses, when he's 22 years old and looks like he'd sooner be found shootin' hoops and spewing out foul language.
Culture can be a funny thing—and it certainly affects self-acceptance. (I'll define "culture" as a ready-made set of answers to life's problems, even if they're very poor answers.)
So far, breast on a man are not generally accepted, nor is a bra on a man. In the comments after an article I read, a man with gyne wrote, and a woman raked him over the coals for being a pervert to be wearing a bra. He explained gyne, which she had never heard of, and she did apologize. The fact that gyne and awareness are becoming more common will slowly change the acceptance, along with how readily a man can accept this unfortunate turn in life.
Kids are the most cruel though, and I especially feel for boys with breasts (like gynomom's 12YO son) who are in junior high and high school, where kids are the most cruel, the most curious, the most observant, the most concerned about being in the "in" crowd, and the least informed, and teachers and other school staff members are no help. As we get older, we become less concerned with what others think of us. Still, I have searched for and found ways to wear a bra to remedy the soreness and irritation even at family and social gatherings, so I'm happy with that, and that nobody is freakin' out because of what they see and deem unacceptable or embarrassing. Nobody knows except one son I've told. (I work at home, alone; so that part is not a problem.)
Would I like to be less limited in what I can wear? Sure. I'd like to be able to wear my most comfortable bra all the time, even though its outline screams "Bra!" more than the others whose shapes don't command nearly the same attention; and I'd like to be able to wear just a thin shirt over it that doesn't have to have plaids, dark stripes, or starch to hide the bra. It's just an inconvenience though. No depression here.