I can't even believe I have to say this, but LET THE MEN WEAR WHATEVER THEY WANT. It is not personally hurting you to see a man wearing a romper. C'mon we have had worse fashion over the years. Personally I love rompers and I think they are great because you can wear them to the beach, out to dinner, on a plane, etc. The only problem with them is how annoying they are to take on and off. However, if a man is up for the challenge then I don't see the problem.
Show off those legs and thighs guys! You don't go through all the pain of "leg day" for nothing.
They even come in a variety of colors so you can match with your bros (or not). I've heard that some men are afraid to wear these because it "threatens their masculinity." Now, sweetie if a shirt and shorts stitched together threatens your masculinity you have bigger fish to fry my friend.
So, if you want to wear the romper wear the damn romper loud and proud. All the ladies will love it.