"Is that a knife in your pocket, or are you just happy to see me?"
"Know how to really please a woman? Give me your blades." (Knife/smatchet/etc. )
Or... if something not knife related is allowed...
"Women try to impress men with their looks and not their brains because the odds are far greater to run into a stupid man than a blind one."
"I'm not married because I don't want to ruin my sex life."
"Yes, you've seen me before. That's why I don't go there anymore."