Why so serious?

I have been told by people that they were afraid of me in high school. I didn't slam people into lockers so I wondered why this was. Turns out, I always "looked" mad. Yes, my natural expression is a frown. Now, it didn't occur to me until yesterday why this was the case. I have really chubby cheeks. Like REAL chubby. Do you know how much work it takes to smile and hoist those bad boys up? Maybe that is why people are always saying fat people just plain look unhappy. All that weight from their cheeks is causing a natural frown. Seriously, right now as you are reading this do a big ole teeth bearing smile...I'll wait, do it. Now, if you have chubby cheeks that took a lot out of you huh? I would like you to spend the next week observing people's natural expressions....the fatties are all frowning aren't they?! Please report back with findings.