I agree about the eyes, the smile and the body language, too. A little more eye contact than usual seemed to be the sign with my husband. He kept trying to catch my eye, and then he also hung around a lot, flirting and saying nice things. He was also very on the spot about opening doors, lifting heavy objects, etc. Very keen on demonstrating that he was a gentleman, which, in comparison to the guys in college, made him seem older and more sophisticated.