Due to its brevity, having an orgasm fries only two or three calories. But the prelude can burn quite a bit more, depending on your weight and the length and vigor of the lovemaking session.
For example, a raucous romp uses about 5 METs (metabolic equivalents), a system for gauging the intensity of physical activity. (Sitting quietly, for comparison, is equal to 1 MET.) So, a 190-pound man would burn 413 calories in an hour of vigorous sexual activity. But since the average lovemaking session is about 20 minutes, you’re talking about only around 150 calories.
Still, that’s more than double the caloric expenditure of sitting alone on the couch.
Models: Baby and Tyler Nixon by X-Art
Angelica and Ben by X-Art