Think you know your sex facts from fiction? Get ready—it’s time to test your in-sack IQ.
2 of 18Women have reported reaching orgasm 81 percent of the time through oral sex, compared to 25 percent of the time through intercourse.
4 of 18The ages change slightly depending on the person, but women's estrogen levels surge in their mid to late 20s, while guys get a big dose of hormones in their teens.
6 of 18According to The Journal of Sexual Medicine, the median time it takes men to get off is 5.4 minutes.
8 of 18So if you're looking for some oral love later, best to skip the Starbucks.
10 of 18Researchers at Stanford University found that it took just a couple of minutes of some good ol' porn to get women turned on. The only difference? Women tend to like porn with a storyline (you know, the pool boy enters the kitchen...yada yada).
12 of 18Marking sex dates on your calendars can actually increase anticipation, making you lust after your spouse even more.
14 of 18This is the same number you've been hearing since high school, but The American Sex Survey found that most men think about sex a few times a day—not a few times a minute.
16 of 18Married couples are not only more satisfied with the quality of their sex lives—they're also having sex more often.
18 of 18Believe it or not, the original vibrator was invented in the 1800s to medically treat "female hysteria." What was the illness? My-husband-is-bad-in-bed-itis?