As a teacher I had in 7th grade said: "Seventh grade is the only year when two people will come to school dating, break up before lunch, and get back together by the end of the day. Without talking to each other once."
A pick-up line I like:
You: Did it hurt?
Them: Did it hurt when?
You: When you fell from Heaven.
Them: Aww, your so sweet.
You: No, really did it hurt?
Them: Umm...yes?
You: That would explain your face...