Oh man I used to know all the bad ones...

You: Did it hurt?
Her: What?
You: When you fell from heaven.

You: Your pants are like a mirror....I can see myself in them. (theres also some variation on this about the pants being space pants).

You: Are you tired? because you've been running through my head all day long.

My personal favorite, yet probably worst one: Just so I know for breakfast...do you like your eggs scrambled or fertilized?