"Your lips are like pastry… Fancy going halves on a sausage roll?"

That got me slapped several times. What used to work for me was:

"Hello, you look like fun" – Don't know where it came from or how it started…

Mr Woppit you sound like you need a root, a stiff drink and a cheeseburger; life's too short for that line of thinking . just an observation.

This surprisingly worked for me years ago –

I spotted a girl in a club, we were eyeing each other up and smiling, i did the 'come here' beckoning thing with my forefinger. When she came over i whispered in her ear 'if i can make you come with one finger just think what i can do with the rest of me'