Cameron Diaz who has not used an anti-perspirant stick or deo for 20 years believes that the world will smell better if people stop using antiperspirants. " I do not believe in them ," said the actress, adding : "It's actually very harmful. I have not used antiperspirants for almost 20 years . People smell precisely because they use antiperspirants. They keep the smell inside. Let it get out. You need to just take care of the hair of the armpits . "Obviously Cameron Diaz has decided to be a painfully frank topic about human anatomy, because previously she gaves tips for private parts hair removal.