(Air hose, not water :p)

"Yes we were, but we needed something to lighten the mood.  Kind of like doing something like this."

He turns the nozzle towards his face, blasting a stream of air to his lips, making them flap.  Still blasting his nose he talks.

"Yes, I will tell people we are dating."

Blasting her face once again he says.

"I am all in, are you?"

Blasting her neck and stomach he turns it back towards himself making his lips flap more and open up wide.