Does Sleeping Around Make People Happier? "Sex makes us happy (do I need to cite my source for that?), but how about 1970’s style love-the-one-you’re-with sex? You know the kind of sex that is preceded by fishing around in a bowl at a party for a set of car keys? Research suggests that promiscuity is not associated with increased happiness and, in fact, that the number of sexual partners needed to maximize happiness is exactly one."