It has become a favourite celebrity pastime, with everyone from Scarlett Johansson to Vanessa Hudgens having being caught in the act.

Now, however, scientists say our willingness to share naked picture of ourselves with others might actually not be our fault - it could be hardwired into our brain.

'Being desired is very arousing to women,’ claims clinical psychologist Marta Meana, president of the Society for Sex Therapy and Research.