Many of us know a fact or two about doing the deed, but here are a few extra that might blow your mind.  

Sex Facts

1. Complete sexual inactivity may cause penis size reduction, meaning if you don’t use it you could actually lose it. "If they don't do anything to maintain normal erections, they will get shortening of the penis," said Dr. Tobias Kohler to WebMD. Without regular erections the penis can become one to two centimeters shorter.  

2.  According to the National Bureau of Economic Research, sex makes people as happy as making $100,000.

3. Exotic dancers make more money while ovulating due to the release of pheromones.

4.  "Wegasms," or a couple who orgasms at the same time, is a very rare occurrence. It’s so rare that 42 percent of couples think that they have a better chance of seeing Bigfoot than experiencing one.

5. It doesn’t sound like doing these might incite any pleasure, but 51 percent of women have had orgasms while doing crunches.

6. Despite not being real, some people actually have a physical attraction to mannequins and statues. It’s called agalmatophillia.

7. If a man is righty or lefty that’s usually the same side of his shortest hanging testicle.

8. Before you have sex, you might want to slip on a pair of socks because you’re more likely to orgasm with warm feet.

9.  Though they are small, they’re certainly fast: Sperm travels at 28mph when locating an egg.

10. Sex is a workout: An average session can burn up to 144 calories.