To Baron Max,
you're wrong, to put it simply. "Cavewomen" (better known as neanderthals) led small bands of hunter-gatherers throughout hominid evolution. Similarly, when the agrarian transition emerged, the burgeoning hunter-gatherer populus was led predominantly by the women, in what is known as a matriarchy. Neanderthals, as were other hominids, including early humans, were generally monogomous, which means that they aren't oppertunistic with partners. They were family oriented, to help ensure safe and successful offspring as both parents would be needed to nurture the child.
And in regards to your second statement, you're spot on. Prostitution is about more than the sex worker and her/his client. It's about the abusers that coerce and manipulate many of the prostitutes. It's about the pimps that drug and abuse their prostitues. It's about the men who, of their own volition, repress women and keep many of them poor in order to get laid.
A man buying his date a drink "in hopes of getting laid" is hardly comparable to a woman selling herself on city streets, subjecting herself to rape, disease, abuse, drug addiction, and death.
Qorl- Prostitution doesn't eradicate rape, murder, violence, ect. Essentially, legalizing prostitution, specifically street-walking, will bolster a society that opresses, abuses, and objectifies women more brazenly than it all ready has.