I can't speak for the guys with crazy length, but my girth is close to 7 inches during sex and my wife keeps threatening to leave me. She says it's painful and gives her anxiety.
It's just ironic because in my last relationship I was "too small" now after doing PE like a mad man I am "too big" are women ever truly happy with a man? Is it possible for a woman to think wow your cock size is perfect. It seems like you are either too big or too small no matter what a woman can never be truly satisfied, the study doesn't mean anything to me...
One thing is for sure any kind of body modification you do will make other people judge you, even your family and friends will judge you. Whether it's getting a exciting tattoo or plastic surgery or dying your hair, whenever you change yourself even if you are trying to feel better in your own skin people will look for the negative.
