7 – Avoid Regret – We smile to avoid feeling bad for not smiling. Sounds weird and circular, but we don’t want to hurt people’s feelings so we smile when someone shares some story about their dog, even if we don’t really care. Studies show that if we don’t smile, we feel regret for failing to do so. This regret brings down our mood and boosts stress hormones.

8 – Increase Attention – Stress limits our perceptions and narrows our attention. Our body kicks into fight or flight mode where we can focus only on one of those things. Smiling counteracts this and widens our attention again, opening us back up to multitasking and insights that come from the fringes of our perception and our subconscious.

10 – Contagious – Around 50% of people smile back. This spreads the health benefits throughout those around you and it comes back to you several times as well.

11 – Build Attraction – Smiling makes people more attractive. This seems to be especially true for women. Men are more likely to approach a woman who smiles than one who simply makes eye contact while women aren’t necessarily drawn in by a smile alone.

12 – Earn Success – A smile can appear confident, self-assured, and on top of your work. Those who smile are more likely to earn more money through tips and raises. They are more readily approached with business ideas and offered advancements.