You and Catwoman knew each other for a long time, she was a professional thief and you were a professional crime fighter. Batman one day, when you were in the Batcave, and she was coming down to you from the top floor, she noticed that you were doing something in the Batcomputer, she slowly and silently creeps up to you and gently grabs your neck from behind

"Hey, what are you doing? Maybe you could put aside your work and we could do something more interesting?~"