1. It proves you have teeth.

Teeth are one of those universally hot physical traits—unlike putting a plate in your lip or tattooing your forehead.

2. It makes you appear friendly.

Crazy how simple that is—smiling = friendliness. But it’s true. And mysteriously, when you appear friendly, people are more likely to want to be your friend,  and you definitely want female “friends.”

3. You look hotter when you smile.

I know you don’t think you do—but I promise—you do.

4. Women will think you are smiling at them.

When women see a picture of a guy, they imagine what it would be like if he were looking at them, and if you are frowning, they imagine what it would feel like to piss you off.

5. Smiling makes you look less like a serial killer.

And anything that accomplishes this is worth the effort. Have you ever seen a serial killer sporting a friendly non-creepy grin? (Because I know we’ve all met hundreds of serial killers right?) Well, I haven’t. The keyword is “friendly,” not “ha ha, I just killed 200 people and made omelettes out of them.”

Stay tuned for a post on “How Not To Look Like a Serial Killer Even If You Are.”