What is the most sexy physical trait of the opposite sex in your own mind??

For me, it would be a tie between hair and eyes. I like it when a guy can pull off a really cool hairstyle. As for eyes, they can show what a person is thinking and feeling. They are called the window to the soul for a reason. ^-^

Deep, expressive eyes. There's nothing sexier. And a non-physical trait would have to be intelligence, hands down.