> E.g. dollies/ make up/dance for girls, cars/ shirt/football for boys. We don't mix enough "gender interests" and we inculcate this difference in kids even not on purpose. I hope it's changing

Another side of it would also be boys in girls hobbies I think. There is no reason boys can't dance, except cultural. It is perfectly fine sport/art.

I think that one can't exist without another.