Even if a similar number of people would find that exposed guy’s body parts erotic, few would find them so erotic that they’d feel embarrassed walking past him with their parents, children, boss etc. But an overwhelming majority in most communities would not want to meet up with a hot a topless woman in that company. In our society, for better or worse, beautiful topless women are too sexually charged for comfort in mixed company.
Decency laws are not based on an assumption that there’s equality of body parts between the sexes. That would be pushing a foreign community standard as a law's basis. In this case, that a male chest is just as overwhelmingly erotic as a female chest. And considering the difference between male and female sex drives and the nearly universal female role in civilizing that of the male, that claim’s very questionable.
How can you say that with any certainty? I would be very uncomfortable to walk past that guy with my parents or daughter. I can think of any number of scenarios in which a female member of my family would be embarrassed to be in his presence if he were dressed as he is in the picture. If your average Joe were walking down the street shirtless, most women wouldn't give it a second thought. But this guy's body is screaming sex and women would respond to it.
Decency laws are not based on an assumption that there’s equality of body parts between the sexes. That would be pushing a foreign community standard as a law's basis.
I live in Chesapeake, VA which borders on Virginia Beach. Virginia Beach has an ordinance which doesn't allow men to be shirtless unless they are on the beach because they are trying to promote a family friendly environment in the resort area. Are they enforcing a "foreign community standard"?