He tractor down
Because they cantaloupe. (The wife thought of this one... hopefully nobody else has posted it)
Wife: BLTOUR & E Me: Well, that could spell trouble
Because X Marx the spot.
Both are without visible means of support. (My son found that in a children's joke book)
He was tired of Haulin' Oats
Because he picks his ears!
Because he had no arms or legs. Why Because he is a potato.
Because he wanted to wake up oily.