When it comes to sex, people usually associate it with pleasure. It is true, but pleasure is just a small part of it. Having sex on everyday basis facilitates good sleep, burning of calories and stress relief, to name a few.
A hormone called dehydroepiandrosterone gets released during orgasm. It performs multiple functions like keeping the skin healthy and repairing tissue. However, one thing that is more known for is improving immunity.
Men, who have a maximum of two orgasms a week, are known to live longer than men who have sex or masturbate just once a week.