25 Facts About Sex Everyone Should Know

1. Women can get pregnant from sperm left in their bodies, five to eight days after having sex.

2. Sex toys and vibrators are banned in shops in US states Alabama and Mississippi. According to the attorney general, “there is no fundamental right for a person to buy a device to produce orgasm." However, it seems like something the courts should probably stay out of, doesn't it?

3. The vibrator was originally invented in the 19th century to reduce "hysteria," the condition that we now know as "being a little horny."

4. 25% of all penises are slightly bent when erect.

5. The average American man's erect penis is five to seven inches long with a circumference of four to six inches.

6. Studies have shown that when their partners are away, a male's sperm count can decrease.

7. You burn about 200 calories during 30 minutes of active sex.

8. Sperm contains proteins that have the same anti-wrinkle effect as your moisturizer. That means that theoretically, you could use sperm as moisturizer.

9. Humans and dolphins are the only species that have sex for pleasure.

10. When men chew celery, they release androstenone and androstenol odor molecules into your mouth. They then travel up the back of the throat to the nose. There the pheromones in their bodies change, and and can make them more attractive to women.

11. The wife of Feodor Vassilyev (her name has never been recorded) gave birth to 16 pairs of twins, seven sets of triplets and four sets of quads -- that's 69 children, total.

12. 75% of men always reach orgasm whilst making love, but only 29% of women are able to reach climax.

13. Dr Kellogg (yes, of Kellogg's cornflakes) was an avid anti-masturbation campaigner, and believed if you had a healthy diet it would reduce sexual thoughts popping into your head. Cornflakes will never be the same.

14. Physiologically, female orgasm is designed to induce pregnancy: The pulsating of the vagina pushes sperm towards the uterus.

15. Researchers have repeatedly observed female penguins exchanging sexual favors with male penguins in exchange for pebbles they will use to build nests for their babies.

16. Shaving your pubes makes you more likely to spread a sexually transmitted infection, as pubic hair can act as somewhat of a "goalie" for STDs.

17. Four popes have died while having sex -- sex they weren't supposed to be having in the first place.

18. A single human male produces enough sperm in two weeks to impregnate every fertile woman on the planet.

19. Sex can cause a rash on your skin -- it's called the sex flush, and it can appear on your cheeks, chest, and legs.

20. Birth control pills dampen the libido, as extra hormones interfere with women's sex drives.

21. If you're well-hydrated, you're likely to have a better orgasm.

22. High heels can shift the angle of a woman's pelvis, which theoretically could affect her orgasm negatively.

23. In countries where prostitution is legal, there are actually drive in movie theaters where you can get sex.

24. One UK study reported that of the 2,000 people surveyed, 55% of the participants admitted they go to concerts to find sex.

25. The black widow spider eats her mate during or after sex. In fact, she can eat over 20 lovers in a single day.