I took my cat to the vet, and they said it was having some vision problems.

I guess you could say it was having a paws-itive correlation between its eyesight and its purr-manent blindness.

Why did the man get fired from the button factory?

He kept losing his temper.

Why was the math book sad?

Because it had too many problems.

What do you call a sleeping bull?

A bulldozer.