Because they’re smart. This is the young Bill Gates. Think of all of the effort he could have expended chasing girls. He could have gotten a better haircut, better glasses, a nose job, 2 years of bodybuilding, made lots of calls, bought lots of flowers, chocolates, dinners, bottles of wine, and they’d still say “ew, you’re a stinky nerd, I couldn’t love you if you were the last man on earth.” But Bill was smart. He instead devoted his time and effort to becoming the richest man on the planet and suddenly he started looking better to the opposite sex. Billionaire Bill didn’t have much trouble finding a mate; He and Melinda have been married 23 years now, have 3 kids, and by all reports are happy together, without all the messy chasing phase.