Many conversations about sexuality focus on health. It’s safe and respectable. Builds the immune system? Yep. Good for the heart: check. Relieves menstrual cramps and depression: double check. Sex bonds us through the oxytocin-dopamine cascade: check again. We know healthy people have more sex, and having good clean fun may help you live longer too. Orgasms are great for body and mind, and caresses feed our skin hunger. Check, check, check.