Teacher asked for joke

Harold was sitting in class with his fellow peers. The teacher of the class asked for a volunteer to say a full sentence about their parents. When no one raised their hand, the teacher called on Harold to say the full sentence. He replied with "My Dad eats
light bulbs." The teacher looked at Harold strangely and said "Oh no, Harold, your dad doesn't eat light bulbs, that's absurd". Harold argued back, "Yeah, last night daddy said to mommy, oh honey, turn off that lamp and let me eat that thing".