iPhone app counts calories burnt during sex

An iPhone app has been launched which calculates how many calories couples burn during each sex session.

Using Bedometer people place their loved one (the iPhone) on the bed while having it away - motion sensors then analyse the time and intensity of their romp.

The 59p app then works out exactly how many calories you have burnt and even gives you the option of sharing this information - along with the number of thrusts - on Facebook.

Makers claim a vigorous 15 minute sex session burns almost 200 calories each - adding that Bedometer is "the ultimate bedroom athletics measuring tool".

Before you ask, the answer is yes, the app has single and multiplayer options.