Of course, says Adshade, the link between promiscuity and unhappiness is correlative, but not necessarily causal; there's no evidence that promiscuity makes people unhappy. It's possibly that the less happy are simply more promiscuous by nature. Here are some other tidbits Adshade uncovers in recent studies:
We know sex makes people happy and more sex makes people even happier. Men and women are made happy by sex. In fact, one study found that sex made women happier than any other activity. Younger people are happier in general, but not made any happier by having sex than older people are. More sex brings happiness into the lives of the highly educated compared to less educated people. Money may bring you happiness, but it won’t buy you more sex. Being homosexual doesn’t make you any happier than anyone else, but it does mean having more partners.