You can see, over and over, people seeing rises in sex hormones — particularly in testosterone — brain waves getting zipped up in the same way that lovers’ brains look when they’re in deep pleasure. There have been beautiful studies that show even fast breathing can produce strong states of sexual arousal. And just recently, there were studies in India where they looked at married couples who took up yoga and surveyed them before and after. Across the board, it’s improvement in desire, arousal, orgasm, overall satisfaction. Men have better erections. Women feel more emotional closeness with partners. It definitely does lots of good stuff.