For hominoids this involves being pregnant for the greater part of a year, being massively pregnant during the later months, and caring for utterly helpless and nude young without a protective pouch. Consider other mammals on Earth. Where they are born in a den, such as the bear, or into a pouch, such as a Kangaroo, they are utterly helpless and nude. But where they are out in the world, they are born literally on their feet, and scampering about after their mothers shortly after birth. Humans have the worst of both worlds, so place a supreme emphasis on the love bond.
Competition is intense, and the requirements of the female go beyond any physical attraction.
If not, she will ignore her urges and deny him sexual contact. The young are collected by those assigned this task, and raised essentially in orphanages. She in fact receives more support than she could ever use, an abundance. The issues revolve, instead, around the child. Who would provide the best genes, the most sustaining parental attention, and the most stimulating environment.