The letter C.
A DINE-O-SAUR. I think my brother is a future stand-up comic.
Stand up!
Because it's too salty.
A row bot.
Because they got lost at C.
They picked random letters from a hat. C, eh N, eh D, eh
SECOND PIGLET: He signs his letters with lots of hogs and kisses.
Pupil: Smiles - because there is a mile between the first and last letters