Been logging sex as cardio? Bad news...

http://jezebel.com/5980647/if-youre-having-sex-to-lose-weight-then-your-sex-life-is-empty-and-sad

"Bad news, um, mystery sex acrobats: Researchers have announced that, despite popular and enduring myths to the contrary, having sex does not burn a significant number of calories. In fact, it burns, like, eight. (Actually 21, on average. But basically eight.)."

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