A Two-knee fish!.....
As developing children their knee grows.
If you're not on your knees, he's not interested and you know what they say, abstinence makes the Church grow fondlers.
Because the land never waves back
A good start!
Because all the ones that can run, jump and swim are already in America.
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)
A two-knee fish! (works better when you're drunk)