"You must be used to people telling you that you are beautiful. I need to come up with more interesting romantic things to say to you that no one else will."
Examples:
Hey, I want to eat mustard out of your hair.
If we were driving in the car, and we passed some roadkill, like an opossum, I would tell you that if you were that opossum I would pull over and just roll in you. The police officer that showed up would have to shoot me to get me out of the road.
