If you're more active than average, then that will only make things more beneficial for you and that lucky gal. A health benefit of sex, particularly a rigorous hour of sex, is that it may burn even more than 300 calories depending on how rigorous you get.

Fountain of youth

Although the orgasm is sometimes referred to as the "little death," having at least two orgasms a week can increase your life span. Every time you reach orgasm, the hormone DHEA (Dehydroepiandrosterone) increases in response to sexual excitement and ejaculation.

DHEA can boost your immune system, repair tissue, improve cognition, keep skin healthy, and even work as an antidepressant. Therefore, a health benefit of sex if you keep the orgasms coming, is potentially a longer life.

More hormones are good

Both testosterone and estrogen levels experience a boost through regular sexual activity. Testosterone does more than just boost your sex drive, it helps fortify bones and muscles, and it keeps your heart in good working condition as well.

In women, sex increases the levels of estrogen, which protects against heart disease. Ever wonder why women love the touchy, feely stuff so much? It's because of their rise in estrogen levels. This hormone also plays a huge role in a woman's body scent. While estrogen makes women sentimental, a rise in their testosterone levels is what makes them desire penetration.