Why did the farmer's wife leave him?
He was always picking up chicks.
How do you break up with a farmer?
Write a John Deere letter.
Why don't people have weddings in the winter?
They're worried about someone getting cold feet.
Why did the physicist break up with the biologist?
There was no chemistry.
Why did the physics teacher break up with the biology teacher?
There was no chemistry between them.
How are relationships like algebra?
Because you look at an X and wonder Y.
What's the best way to get over someone who's broken your heart.
A steamroller.
Why was the ghost lonely?
He lost his ghoul friend.