As far as legality, I’m torn. I definitely think it’s not in good taste for anyone to go topless - male or female. And yes, I will admit, as a woman, that I find it distracting when men are shirtless. I know it’s the norm at places like the beach or pool, so I deal with it, but I’m also glad that rash guards and shirts for sun protection are becoming fashionable.
But as far as it being illegal, I don’t know. I think public decency laws have their place, especially when it relates to safety issues like traffic and distraction. At least in American society, it’s definitely the case that a woman without a top is considered much, much more distracting than a man without one. But most public places have “no shirt, no shoes, no service” policies and I approve of those. Also, laws on public decency have sometimes been used to discourage public breastfeeding, which I think is a misuse of those laws.
I try to keep my focus on policing myself and raising my children to make good choices, regardless of what the other people around us are doing.