Because he only had one pupil! The joke is that I have no friends
Because all his friends Argon.
He was way too autistic for his own good.
A. Because everyone keep recycling the same jokes
Tell him a joke when he's a baby!
Because the supermarket closes at 7:30
A women will normally want more children after a year or two. No man has ever wanted another kick in the balls. Case closed.
Because it increases the average IQ of the world. It's a public service.
It's terrible, we have to do all the work, but the teachers get paid.
He only had one pupil.
Pupil: Dead I didn't even know he was sick!