Buzz·Posted on Nov 6, 2015What Is Your Sex IQ?How much do you know?by Alex FinnisBuzzFeed Staff, UKFacebookPinterestTwitterMailLink 5.5–6.3 inches (14–16cm) Correct Incorrect 5.5–6.3 inches (14–16cm) 6–6.5 inches (15.2–16.5cm) Correct Incorrect 6–6.5 inches (15.2–16.5cm) 6.3–7.2 inches (16–18.3cm) Correct Incorrect 6.3–7.2 inches (16–18.3cm) Correct! Wrong! 5.5–6.3 inches. According to the NHS, a penis would only be considered unusually small if it was less than 3 inches long when erect. Male condom Correct Incorrect Male condom Female condom Correct Incorrect Female condom Contraceptive pill Correct Incorrect Contraceptive pill Diaphragm Correct Incorrect Diaphragm Correct! Wrong! Contraceptive pill. According to the NHS, the combined contraceptive pill is more than 99% effective when taken correctly. For male condoms it is 98%, 95% for female condoms, and 92-96% for diaphragms. Two minutes Correct Incorrect Two minutes Five and a half minutes Correct Incorrect Five and a half minutes 15 minutes Correct Incorrect 15 minutes Correct! Wrong! Five and a half minutes. According to the NHS. Yes Correct Incorrect Yes No Correct Incorrect No Correct! Wrong! It doesn't. According to this study it made no difference. Answer Image Pea Correct Incorrect Pea Answer Image Lime Correct Incorrect Lime Image: Via Thinkstock Courgette Correct Incorrect Via Thinkstock Courgette Via Thinkstock Correct! Wrong! It's the size of a courgette. The external part may be small, but it extends around 5 inches into the body and has nerve endings similar to a penis. Yes Correct Incorrect Yes No Correct Incorrect No Correct! Wrong! You can. According to the NHS. Although you'll be glad to know it is very unlikely. Answer Image A T-shirt Correct Incorrect A T-shirt Answer Image Kneepads Correct Incorrect Kneepads Image: Via Thinkstock Socks Correct Incorrect Via Thinkstock Socks Via Thinkstock Correct! Wrong! It's socks. According to this study, having warm feet helped 30% more couples to achieve orgasm than without. Yes Correct Incorrect Yes No Correct Incorrect No Correct! Wrong! It is! “Some people do experience orgasm from nipple stimulation alone,” says Debby Herbenick, PhD, author of The Coregasm Workout. 90% of women and 15% of men Correct Incorrect 90% of women and 15% of men 70% of women and 30% of men Correct Incorrect 70% of women and 30% of men 50% of women and 50% of men Correct Incorrect 50% of women and 50% of men Correct! Wrong! 70% of women and 30% of men According to this survey, in which most women they did it to spare a partner's feelings, while the men said they did it to end the sex session. 3–5 Correct Incorrect 3–5 10–15 Correct Incorrect 10–15 20–30 Correct Incorrect 20–30 Correct! Wrong! It's 3–5. According to this study by PLOS One, men burn an average of 4.2 kCal/min, while it is 3.1 for women. 25% Correct Incorrect 25% 40% Correct Incorrect 40% 60% Correct Incorrect 60% Correct! Wrong! It's 40%. According to the Kinsey Institute. For men of the same age, it's 37%. Regular difficulty reaching orgasm Correct Incorrect Regular difficulty reaching orgasm Having multiple orgasms Correct Incorrect Having multiple orgasms Squirting during orgasm Correct Incorrect Squirting during orgasm Correct! Wrong! Regular difficulty reaching orgasm. According to The Mayo Clinic, "Anorgasmia is the medical term for regular difficulty reaching orgasm after ample sexual stimulation, causing you personal distress." 94% Correct Incorrect 94% 85% Correct Incorrect 85% 51% Correct Incorrect 51% Correct! Wrong! It's 85% Though according to the Kinsey Institute, only 64% of women report actually having an orgasm the last time they had sex. 40 Correct Incorrect 40 10 Correct Incorrect 10 Less than one Correct Incorrect Less than one Correct! Wrong! Less than one. According to this study, there's about 0.7 calories in a typical ejaculate of 3.4ml. 1902 Correct Incorrect 1902 1950 Correct Incorrect 1950 1969 Correct Incorrect 1969 Correct! Wrong! It was 1902! According to this advert for "La Vida Vibrator".