Whatever the reason, experts say that at our core, there's one reason we find wealthy men attractive: instinct. Women, research shows, rank the ability to provide as the most important quality when selecting a mate. Men, not surprisingly, prize a woman's looks and youthfulness over her other qualities, because those are indicators of fecundity. It's all about finding the best person to breed with. As it turns out, we're all just slaves to our prehistoric urges, even in an era when none of those millenniums-old rules would seem to apply… A 2006 study done through the University of Chicago shows that men who post online profiles indicating income of $250,000 a year generate significantly more contacts (up to 151% more) than those who make under $50,000…