You knock on the door.
Because they don't like random people knocking on their doors
Triforce
She has no arms... Knock knock Who's there Not Suzy
It's 2:00 in the morning. Her: I don't know. Do burglars knock Me: It depends on how they were raised...
Marty Mc. FLyyyyyyyyy!
10 E's
Swim down and knock on the hatch. (In Sweden we have a running tradition of telling jokes about stupid norwegians. They do the same about swedes)
So they can stand closer to the sink
A submarine
Jesus in a submarine.
A wind tunnel.