raison de quack quack
Raison de quack quack is inspired by the raison d'etre ... For ducks that would be, to be is to quack. For humans, to be is to ... quack like a duck? Or something else? (1) Being horny and (2) in the mood for a good time.
Queef really liked his women. He definitely had ze raison de quack quack.
"Do you have ze 'raison de quack quack'?", she asked, pulling down his zip.
"Do you have ze 'raison de quack quack'?", she asked, pulling down his zip.