You Have a Sweet Smile
You smile because you are a truly happy person. There is nothing contrived about your smile.
You find life and other people to be delightful. You're often grinning without even knowing it.
You are an extremely honest and open person. It's easy to read your face to know what you're thinking.
Luckily, you're usually thinking upbeat and positive thoughts - so you really don't have anything to hide!