In most areas, women aren't allowed to be topless in public, but this is //not// a gender equality issue. Amirite?
It would be about gender inequality if men were able to show their private parts and women weren't. That's not the case though. No one is allowed to show their private parts. Thus, it is equal. The same rules apply. Women just have an extra private part that children and men don't have. That's just how we're naturally made. It's different, but not unfair or unequal. Private parts determine sexual maturity. The penis, vagina, and breasts show sexual maturity so these are the parts that are supposed to be covered. Also, primates also found breasts as sexually appealing so this is not unique to humans. It also means that we didn't make breasts sexual. We naturally think they are sexual.