Recent research shows that it might not. One study found that people who faked smiles while looking at pictures reported feeling less positive about themselves than those who didn't fake a smile. The researchers also found that when people are forced to put on a smile for an extended period (such as during an awkward date or meeting), they experience more anger and negative moods than if they had been allowed to wear their normal expression throughout the event. So before you go around with your fake grin all day, remember: the stress may be worth it in some cases but not always!