I know a few ones I can't reproduce here, but here's two that are fairly PG-rated:
- Did it hurt?
- What?
- When you fell from heaven.
or
So, have you seen the man of your dreams yet? Or must I pass in front of you again?
I actually tried the last one once, but she thought I was joking (and I was, of course, I'd never use such a corny pick-up line, but I was actually interested

). I kept hitting on her until she realized I was serious (hitting, for me, means 'talking with her and once in a while throw in a flattering remark'). Then she said "You know, you're a really nice guy, but no"
I'll also say it jokingly to my girl friends sometimes. I usually get witty remarks in response, such as "No, please, don't, you're blocking the view".