My idea is there is a world like our own in many ways, but women have always been bigger and stronger than men. As such gender roles are nearly reversed (not totally, as women are still the ones to get pregnant, breastfeed, etc.)
Girls are the ones mainly interested in sex and wanting to sleep with as many boys as possible. Boys want to avoid a lot of sex so they aren't labelled as a slut.
I'm interested in exploring any ideas set in this world. It could be something as simple as a school or office scene or something more elaborate.
Message me so we can discuss ideas.