Writer Jill Filipovic has a great, short piece about why having sex before marriage is good for our morals. Basically: Sex makes us much happier people. Much, much happier. You should feel okay about having sex as consistently as possible, because the average brain is certainly better for it:
95 percent of Americans don't wait until their wedding night. And that's a longstanding American value. Even among folks in my grandparents' generation, nine out of ten of them had sex before they wed.
Of course, just because lots of people do a thing doesn't mean it's a good thing. But sex is. In terms of happiness, sex is better than money, and having sex once a week instead of once a month is the "happiness equivalent" of an extra $50,000 a year. People with active sex lives live longer. Sex releases stress, boosts immunities, helps you sleep and is heart-healthy.