So he can pretend she's decomposing.
Pupil: Up and down or across Teacher: What do you mean Pupil: Well up and down makes a 3 or across the middle leaves a 0!
Finding a vein in a hot dog.
Because he didn't like the look of the Poles (for this to make sense, pretend the UK election hasn't happened yet)
Decomposing
He's decomposing.
A: Inflate it.
A pumpkin!