Question 2 of 11

Viagra causes what chemical compound to be released in the penis?

... Viagra causes nitric oxide (NO) to be released in the penis. It binds to an enzyme called guanylate cyclase, leading to an erection.

Question 3 of 11

On average, how often do American married couples engage in sexual intercourse per week?

... American married couples have sexual intercourse an average of 2-3 times per week. And in case you're wondering, a survey done by Durex condoms showed that Eastern Europeans have the most sex. It gets cold in Russia, you know.

Question 4 of 11

In their groundbreaking study, Masters and Johnson put forth the idea that the female orgasm comes from the stimulation of what area?

... William Masters and Virginia Johnson published a book of their research, Human Sexual Response, in 1966. In it, they claim that the female orgasm comes from stimulation of the clitoris.

Question 5 of 11

True or false: Women tend to reach orgasm quicker when ovulating.

... Studies show that women do tend to reach orgasm quicker when ovulating, leading to the belief that orgasms are tied in to fertility. There also tends to be an increase in the uptake of sperm during orgasm.

Question 6 of 11

True or false: Sperm count is lower in semen after intercourse than after masturbation.

... Sperm samples collected after intercourse contained 70 percent -120 percent more sperm than samples collected after masturbation. In addition, the sperm collected after intercourse showed better movement.

Question 7 of 11

What is the average size of an unaroused penis?

... The average penis is between 5.1-5.9 inches unaroused.

Question 8 of 11

True or false. The human penis is smaller than a gorilla's.

... The human penis is larger and thicker than any other primate.

Question 9 of 11

Medieval Western folklore held that male nocturnal emissions were caused by nighttime coupling with what creature?

... The succubus was a demon who took the form of a beautiful woman, often seducing men to their death.

Question 10 of 11

True or false: There is a correlation between the number of older brothers a man has and his odds of being homosexual.

... Called "The Fraternal Birth Order Affect," studies have shown that each older brother increases a man's odds of developing a homosexual orientation by 28 percent - 48 percent.

Question 11 of 11

Which Catholic saint was an advocate for the missionary position?

... St. Thomas Aquinas belived that the missionary position was the only suitable sexual position, since animals copulated in what is today known as "doggy style."