Labored breathing. Undulating fats dripping sweat. Pungent smells and fluids of all sorts leaking out of every orifice. When you get right down to it, is there anything less sexy than sex?

According to several recent studies, the human body is both exceptionally gross and fantastically weird, and never more so than when it is engaged in the act that makes new human bodies. Despite exceptional amounts of popular interest, the physical effects of sex on the body have historically proven somewhat difficult to study.

For many years, religiously-motivated concerns about morality prevented studies from happening, and even when a study finally gets underway, other problems presented themselves. "The Observer Effect" states that it is impossible to stick a bunch of electrodes on a couple, set up a bunch of recording and monitoring devices, and watch them having sex from behind a two-way mirror and still think that your results will mirror those of sex in the wild.

Despite all of those obstacles, we have managed to learn a few things about what happens to your body during sex. Here is a list of some of the gross, weird, fun, awesome, hilarious, and confusing things that humans do when they're doin' it.