Because he only had one pupil! The joke is that I have no friends
He's a fungi
He finishes her drink EDIT: Apparently this is Conan's joke, so all credit goes to him. I just heard it from a friend of mine and I had no idea.
A wise quack.
Ha! You actually thought I ran a marathon! Jokes on you, I'm just drunk!
You have to deal with people who forget to close their tabs.
At the beauty salon" "Were they closed! "
Mark: We played a guessing game. Mom: But I thought you were having a math exam Mark: That's right.
The alphabat.
Pupil: I get up early !
Pupil: Cannot miss Teacher: and what is don't short for Pupil: Doughnut !
He only had one pupil.