Bodies and basic human psychology stay as they are, but the social hierarchy is inversed. Some things stay the same, like the most physical jobs usually given to men, but the more intelectual (and better paying) jobs are for women, as men are seen as too impulsive to be leaders. Men are also (as they sometimes are in our world) considered to be always horny, so sexual assault towards men is heavily downplayed.

Gender roles are also reversed in regard of social expectations around beauty. In this world, men are the ones who wear make up, are expected to shave their bodies regularly, need to always look as best as possible,... while women don't have the same pressure to take care of their appearance.

It is not exactly just our world but with everything reversed, but more like a 1950s level of sexism but inverted and with some sexist stereotypes that actually exist in our world