Why does she show her teeth so much ?

Because, she is happy, of course.

Is that her natural smile ?

Because she has a horrible underbite. She needs one of those helmet things.

nah looks pretty fake smile to me

Us fellow Brits are known for bad teeth... for a Brit, her teeth are AMAZING!

And her face, I just want to stroke it...

Oh come on, that British teeth thing is fake. It's a stupid generalization that isn't as true as people claim.