Welcome to sex ed class.
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1. Sex works as a pain killer — especially with headaches.
2. The average size of a man's penis is 5 to 7 inches when erect.
3. Semen can be used as a face cream to help fight wrinkles and prevent acne.
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4. The merkin — pubic wig — was used for sanitary reasons back in 1450. Now it's used as an erotic toy or a decorative object.
5. There are about 250 million sperm in a teaspoon of semen.
6. A man ejaculates at an average speed of 28 mph.
7. There are 5 to 25 calories in a teaspoon of semen.
8. The vibrator was invented to reduce "hysteria" in the 19th century.
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