Women will burn calories, the equivalent of a bar of chocolate or two bowls or cornflakes. Writing on the website, Dr Felix experts said: But if you're trying to use it to burn a specific amount of calories, you're probably missing a big part of what sex is: But does sex actually burn a good number of calories? The bedmates in the study, who were 23 years old on average, may also have been having more vigorous sex than the typical person. It's hard to know exactly what you're going to get. As mentioned earlier, people of different weights burn wildly different calories when doing physical activities. This is the equivalent of a slice of pizza or a glass of wine. After all, super-fit celebrities like model Miranda Kerr , reality star Khloe Kardashian , and actor Charlie Hunnam have sworn that they stay in shape by having a lot of sex. Ultimately, trying to determine a blanket number is never going to work. But other studies have found those numbers don't quite add up. One study found that people who identify as men burn calories while having sex, and people who identify as women burn 69 calories. According to another study, a pound person burns calories per mile walked and a pound person burns about 65 calories. On top of that, there's a million different ways to have sex, with different partners, and in varying intensities. This is the same as 55 minutes of swimming or playing an entire football match.