Sex is one of the more enjoyable exercises you can do.

Get Moving To Improve Your Mental Health and Mood

Burn extra calories with sex!Regular physical activity can help keep your thinking, learning, and judgment skills sharp as you age. It can also reduce your risk of depression and may help you sleep better. Research has shown that doing aerobic or a mix of aerobic and muscle-strengthening activities 3 to 5 times a week for 30 to 60 minutes can give you these mental health benefits.

Some scientific evidence has also shown that even lower levels of physical activity can be beneficial.

Does sex count as regular physical activity?

It certainly does according to most reputable fitness websites.  Here is what FitDay has to say about sex as exercise:

…”Sex has many of the same effects on the body as an intense workout. During sex, your heart races, your metabolic rate increases, you burn calories, and stretch and strengthen muscles. Sex has also been shown to boost the immune system and provide stress relief, just like a good cardio session.”

 But do you have to have wild sex for it to count?

Nope.  Even if you do not burn 1,000 calories and have tantric sex, you will still be being active and doing something to improve your mood, reduce stress, and give you an overall feeling of satisfaction (hopefully, if not — speak up and tell your partner!)

…”The “average” sex session lasts about 30 minutes and burns between 50 and 100 calories. It doesn’t sound like much, but sex is a physical activity like any other where you get out of it what you put into it, so if you are vigorous between the sheets, you’ll burn more. That number also relies on many factors like body weight, duration and position to determine an exact burn”

Source: Centers for Disease Control and Prevention