Bot male and female are slave of his instincts. Instinct to reproduce and ensure the extension of the species. Male try to put his dick in every hole, female try to find best dick, to get best offspring. Like every other species on this planet do. But THEY successfully re - programmed part of population. So you get healthy 22 year old girl which want to be sterilized, males which get voluntary sterilized.... Fail of functional marriage - family, wamans which replace his maternal instinct with career rat race, etc.