You say that because you (and me, and pretty much every straight man in America) has grown up in a society where they did not have the option of having sex with as many sexual partners as they want.
If women were wired like men, things would be quite different.
Personally, living as a dog - humping every female around - doesn't interest me. Some peoples' animal instincts are tempered with morals, and some people derive more happiness and pleasure from adhering to moral behavior than indulging animal instincts.
Some, on the other hand, can only be restrained by laws, fear, and social customs.
The more inner discipline a person has, the less outer discipline they need. That's why a hedonistic society which rejects moral absolutes soon disintegrates and needs a totalitarian style government in short order.