A old husband is watching TV

An old half-deaf husband is watching TV with his wife.

They are watching the DYI network on home repair.

Every time the wife gets up he flips it to the impurity channel not realizing she can hear and flips it back as she comes back to the room.

This goes on for a few cycles till she comes back from the kitchen and yells at him,

“Oh for god’s sake bob just leave it on the impurity you already know how to hang a shelf.”