File this under amazing news: It turns out that sex has positive benefits beyond just feeling amazing. Having sex feels good and it can be good for your health! Studies reveal that it may help lower your stress, reduce your risk of heart disease, and even potentially extend your lifespan. Find out the 9 biggest health benefits of sex.

It's Exercise, Really!

Way more fun than an exercise class, sex can burn calories in levels comparable to a moderate workout. A study done on 21 young, healthy people in Montreal compared the energy they expended during sex to energy expended during a workout, and found that moderately intense sex could help you burn up to 100 calories.

More: Join the Challenge to Boost Your Sex Life