Groucho

Thumper: Look BallFiend!

From the other end of the house I hear peals of hysterical laughter.

BallFiend: Oh Thumper! 

More laughter.

BallFiend: Mum! Thumper's drawn a moustache on her face.

Me: Thumper, why did you do that?

Thumper: I wanted to make BallFiend laugh.

--