Acting pretty

Do we act based on people's appearence ?
I mean... do we treat beautiful / good looking / handsome people better than ugly people ?!...

Take a look at Aishwarya Rai:


Would you act differently if she'd ask you something ?

By the way, Aishwarya was crowned Miss World in 1994 and a few years later (2000, I think) she was voted the most beautiful Miss World of all time. Born on November 1st, 1973, she currently is one of India's most famous actresses.