1. An 18th century Russian woman holds the world record for having birthed the most children: 69, which she had over the course of 27 pregnancies that included 16 pairs of twins, seven sets of triplets, and four sets of quadruplets.

The male record holder for the most kids? A Moroccan emperor who, according to the Guiness Book of World Records, sired "at least 342 daughters and 525 sons, and by 1721, he was reputed to have 700 male descendants."

2. The average erect penis is five to seven inches long and four to six inches in circumference.

3. Approximately 5% of 40- year-old men and between 15 to 25 percent of 65-year-old men experience erectile dysfunction.

4. The average male loses his virginity at 16.9; females at 17.4. A new study shows that genetics may be a factor: inherited traits, such as impulsitivity can make a person more or less willing to have sex at an earlier age.

5.About one out of 10 married adults- 12 percent- say that they typically sleep alone.

6. While 75% of men always reach orgasm during sex, only 29 percent of women report the same. In addition, most women are unable to climax through vaginal intercourse, instead needing clitoral stimulation.

7. Two-thirds of college students have been in a "friends with benefits" relationship, citing lack of commitment required as the main advantage to such an arrangement. More than half of those who had sex with a friend said they had engaged in all forms of sex; 22. 7 percent said they had intercourse only, while 8% said they did everything but have intercourse.

8. According to a survey of adults aged 20 to 59, women have an average number of four sex partners during their lifetime; men have an average of seven.

9. Two- thirds of women who had their first baby between 2001 and 2003 worked during their pregnancy and 80 percent of those women worked within one month or less of giving birth. Compare this to the period between 1961 and 1965, when 44 percent of women worked during their pregnancey and 35% worked one month or less before delivering.

10. At least 50% of sexually active men and women will have a genital HPV infection at some point in their lives.