lifetime, with multiple women at once. Women can have one child every nine months, and then only until menopause. Before modern medicine the mortality rate of childbirth was also quite high, and so the numbers are historically even more lopsided. From supply and demand you've got male sexuality being virtually worthless, while female sexuality is a resource to be protected (and why society frowns on women being casual with what it has worked to protect). A man dies? Meh, we have more. A woman dies? Ah crap, can we still keep the population going? This is made even more complicated by the fact that female reproduction can be hijacked. Think about it, your tribe is attacked, and a woman is raped and impregnated. Not only is she out for 9 months, but unless you're willing to kill a newborn you are now faced with supporting the bloodline of a rival tribe. A different kind of hijack is where a woman is impregnated by one man, but leads a different man to believe the child is his in order to get his resources. This man has now contributed to another man's bloodline instead of his own. Good reason to look at a promiscuous woman sideways. Both of these situations are fundamental to the human psyche. Men will never know forced impregnation (of their own person), and women will never have to worry about whether their child is theirs or another womans. Either scenario further supports female sexuality to be something to