The researchers say the graphs they have plotted, which show the size distributions of a penis, will help clinicians dealing with Body Dysmorphic Disorder (BDD), a serious anxiety disorder relating to body image.Lead author Dr David Veale from the Institute of Psychiatry, Psychology & Neuroscience (Io PPN), King's College London and South London and Maudsley NHS Foundation Trust, told Mail Online: 'Men compare themselves in locker rooms and with pornography on the internet and believe they are inferior.

We discover the little-known facts of the big sleep. Seven or eight hours of sleep is ideal for most of us.

Yes, says Geoff Wright, director of The Hair And Beauty Partnership in London, a clinic which specialises in analysing scalp and skin problems.

Not enough oxygen in your bedroom affects blood flow to the skin, causing puffiness.

Make sure the room is not too warm - switch off the heating, and open a window.

This is because as we age, our skin loses elasticity and collagen, and doesn't 'bounce back' into shape.

The answer is to try to train yourself to sleep on your back.

Experts plotted graphs showing the size distribution of the length of the average penis when flaccid, flaccid and stretched and erect.

Male fertility levels have declined by 50 per cent over the past 50 years.

More sleep treatments Turn the clock back for dry, flaking hands by giving them an intensive overnight treatment.