Myth: Sex burns major calories
Rawpixel.com/Shutterstock Truth: Experts estimate thirty minutes of sex burns 85 to 150 calories. Theoretically, you need to burn about 3,500 calories to lose a pound of body weight, so if you were using up 100 calories every time you had sex, you could lose one pound if you had sex 35 times. The problem is this: Most people are not having sex for thirty minutes. Instead, the average duration of sex is closer to five minutes. In fact, the biggest increase in your heart rate and blood pressure during sex only occurs for about fifteen seconds during orgasm, and then things quickly return back to normal. Sex may not burn a lot of calories, but having sex once a week can actually help you live longer.
Myth: There’s a 10-year difference between women’s and men’s sexual peaks
Megan Betteridge/Shutterstock Truth: Men’s testosterone peaks at around age 18, but women’s estrogen levels peak in their mid-20s. Since low hormone levels have been associated with lower sexual drive, some have asserted that when your levels are at their highest, your drive must be at its peak. But if we believe frequency of sex to be the factor that matters most in sexual peak, then there’s no difference between men and women. Sexual desire constantly fluctuates, and is related to many more factors than age. Over the course of a lifetime, you will see your sexual desire and activity go up and down many, many times.