Here are a few:
hey babe. you're a keyboard. becuase your just my type (leave out the hey babe)
your names cinderella right? becuase I see those clothes coming off at midnight.
(this one works if you keep sneezing) hey baby, you must be an angle... becuase I'm allergic to feathers
and this one is how, my ex-girlfriend got me. "can I borrow your homework"