For many men, that means growing your facial hair to raise money for and awareness of prostate and testicular cancer. And for many women, it means surviving a month of scratchy kisses - but all for a good cause.
Some men, (though not many), manage to pull off a moustache - what do you think of this lot and their fuzzy friends?
Daniel Craig may be James Bond, but that 'tash is still unacceptable.
