Finally, how many calories does one burn during sex.

The conversions are as follows:
1 kJ = 0.2 Cal
1 Cal = 4.2 kJ

[dailymail.co.uk]

Clinical sexologist Sunny Rogers told Instyle the world's most 'vanilla' move between the sheets might actually have the potential to burn serious kilojoules in the long run. You just have to mix things up a bit.

Instead of lying flat and still as your partner thrusts, tilt your hips back and up so you're closer to him.

This engages your core and hip flexors, so you burn more kilojoules while strengthening your abs. Want an added health benefit? Squeeze your kegel muscles as he enters to work out your pelvic floor muscles.

And it's 20 kilojoules per moan - so don't forget your sound effects.