Because.

It's exhilarating, like the wind in your hair when you're riding your bike, like a good song on the radio with the windows rolled down, like a jump off the high dive on a hot summer day.
Try it, one day.
You'll walk down the halls or in the street and you'll give someone a smile, anyone. And as you get a smile back, you'll feel the blood flowing in your veins, rushing through your head, pumping through your heart.
Smiling, loving, hoping, living.

It feels good, knowing you're not nothing.