Are men really more likely to cheat than women? Are bigger breasts less sensitive than smaller breasts? Do guys reach their sexual peak early in life, while women reach theirs much later? In the video below, health researcher Dr. Aaron Carroll takes a look at some of the most commonly held beliefs about sex and separates fact from fiction with the help of a little science. Enjoy!

Want to learn more? Dr. Carroll corrects other common misconceptions about human sexuality in his book: “Don’t Put That In There!: And 69 Other Sex Myths Debunked.”