Because he left a residue at every pole.
A dog that keeps barking up the wrong tree!
She's fine. But the dog died.
Somebody left the plunger in the toilet.
ME: *leans in way too close* Leaving it.
He didn't want people to see his tan lines.
They prefer radians.
Because every time he saw a street pole he imagined two pies.
Hint on Cauchy-Riemann theorem) A: Because it leaves residues at each Pole.
Because he didn't like the look of the Poles (for this to make sense, pretend the UK election hasn't happened yet)