My favorite one that I've ever heard was spoken to a girl I happened to be standing next to in a bar when I was in my early 20s. A guy walked up to her and asked, "could I interest you in a multiple orgasm?" She was speechless, but the guy was unfazed. He simply said, "no? OK, maybe later..." and walked away.
Classic.
Hmmm. Jamie, how come women never use that line with us?