the scientific term for physical differences between males and females of a species is: « Sexual dimorphism ». alot of extreme examples exist: Peacocks far outclass peahens, for instance, while female anglerfish both outsize and outwit their tiny, rudimentary, parasitic male counterparts.
far from those animals, women and men are more physically similar than we are different. although, there are a few key distinctions in our physiques. Some of them are designed to match each sex for the role it plays in reproduction, while others exist to help us tell each other apart and to aid in our mutual attraction.
Breasts vs. chests
Women have breasts, although men have flat chests (but still with nipples on them). Why?
Women are the only primates who are busty all the time, even when they aren’t nursing. Alternative theories exist, but some think breasts are trick for snagging men; though they’re actually filled with fat, not milk, they signal a woman’s bountiful ability to feed her children.
Breasts also help men crack who to pursue to achieve reproductive success. adolescent girls don’t have breasts, and the breasts of post-menopausal women are often withered and saggy . A full, buoyant bosom can therefore demonstrate fertility.
Men aren’t trying to trick women into thinking they can breastfeed, so they don’t have breasts. They do, yet, have nipples: This is because the genes that code for nipple development switch on in utero, and at a very early embryonic stage even before the genes gear up that turn us into males or females.