They always take things literally.
It was homophonic.
Nothing he just waved. Sea what I did there? Sorry sometimes I get a bit carried away, it like a tsunami of puns. Water these puns! they're horrible, I'll stop now.
It's rear end!
Well it's the first thing they say when I approach them.
Boy explains his whole problem Girl: Oh, that's why you didn't notice my nail paint
You get a tardy grade. (that explains the joke if you don't get it.)