here's what i think:
guys are generally hard-wired to take risks. males of nearly all species are like this. the male who takes risks and succeeds wildly can have a harem of females, whereas the male who takes no risks and only partially succeeds in life gets nada in most species, and is therefore as useful in a generational sense as someone who took big risks and lost his life. so from an evolutionary standpoint, it makes sense that oil tycoons get all the girls while franchise managers don't.
on the other hand, females are designed to be choosy. because they only have one womb that can be used during gestation, each choice of who gets to use the womb is important. from an evolutionary point of view, it's in her best interest to wait for the very best possible mate's sperm.
of course, this ignores the whole concept of monogamy and the role a father plays as being a parent to the kid. but even so, i think these factors play a role in making the men do the showboating and the women do the shopping.
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oh baby oh baby, i like gravy.
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