The modern IUD was invented in 1909.

Young was the first condom manufacturer to advertise in a major American magazine—it was the June 1969 issue of Sport magazine, and the ad was against VD. Ironically, Playboy refused to accept Young's ad until 1972.

According to the book Hidden Bedroom Partners: Needs and Motives That Destroy Sexual Pleasure, what your partner does after sex may have lots of hidden meanings. Immediately rolling over and going to sleep may indicate anger. Going to the bathroom may reflect feelings of guilt.

The typical person spends about 600 hours having sex between the ages of 20 and 70.

Americans spend twice as much money on pornography than they do on cookies.

Researchers say that condoms exposed to smog and ozone are less effective.

A survey in Cosmopolitan magazine said that foreplay usually lasts 14 to 17 minutes for the average married couple, and that the man typically reaches orgasm after six minutes of copulation.