I usually go with "I hope that those lips of yours do more than just look good :) ... and by that I mean are capable of producing interesting conversation", and that works pretty well. I guess being sexy helps too
Sometimes I match some sketchy looking girls, and they edit their bios to say things similar to mine just to try and impress me. Kinda pathetic if you ask me, I would have talked to them if they didn't try to be fake
Yay?