Luke: Your are a liar!
Darth Vader: When i was 19 i got it on with your mother.
Luke: So just while back ago the princess gave me a snog
Darth Vader: (sniggers and laughs)
Luke: What?
Darth Vader: Oh ehh nothing you'll know someday, you see I'd once read Obi Wan's mind and i know a secret.
Luke: What is it?
Darth Vader: Ohh, forget anything I said (sniggers)