I don't think 50-50 relationships exist. Men have an incredibly variety of options. It's much harder for a woman to do both things. I think traditional relationships work best.
Carrie FisherHere's how men think. Sex, work - and those are reversible, depending on age - sex, work, food, sports and lastly, begrudgingly, relationships. And here's how women think. Relationships, relationships, relationships, work, sex, shopping, weight, food.
Carrie Fisher