Batman: Did Supergirl just drop you off? Was that a date? Because if it was–Supergirl is way out of your league.
Batman: Hold up… Do you have a crush on her?
Robin: Drop it.
Batman: You do! Wait until Alfred hears about this.
Robin: I know thousands of ways to kill you. Thousands, Grayson.
Batman: Did she try to hit you? Bruce always said if a girl tries to hit you that means she likes you…
Robin: It was a case. Nothing more. She was a fair and adequate partner… For an alien.
Supergirl: … Little jerk!
From – Superman/Batman #77