Walk him and pitch to the rhino.
Pupil : Well you told me never to walk into school ten minutes late !
Disappointed.
Ego-Testicle.
Not even the pool table has balls
An elephant with spare parts !el
One rarely bites and the other barely writes !
Elephino.
Hell-if-i-know (my grandma's favorite joke)
One causes a lot of pain and makes a constant high pitched whine. The other is a useful piece of medical equipment.