Half an hour of sex is said to burn between 85 and 200 calories (the equivalent to 15 minutes on a treadmill).
Most male giraffes are bisexual.
Twelve per cent of adults claim to have had sex at work.
Amaze your friends, break the ice at parties and fill awkward silences at job interviews with this collection of weird and wonderful sex facts - everything you ever wanted to know (and some things you didn't!) about sex.