Have you ever written a comment, or Facebook status, before deciding not to post it? According to new Facebook research, 70 per cent of us do this regularly.

The study found that men are more likely to 'self-censor' their social network posts, compared to women, and this is especially the case if they have a lot of male friends.

More surprising, however, is the reason why the site knows this information - because it can track what you type, even if you never post it.