Careful What You Wish For
Bobs lawn mower had finally given up the ghost. His wife Mavis kept dropping big hints about getting the mower fixed before the grass gets too out of hand, but Bob just kept on making excuses and putting off getting the machine repaired.
To make a point, Mavis decided to shame Bob into fixing the mower, so the very next day, she pretended to set about cutting the grass with a pair of scissors, carefully timed for Bob to see when he gets home from work.
It worked a treat when Bob returned, looked out of the window and saw Mavis trimming the grass with a small pair of scissors in the back garden.
Ten minutes pass and Bob go's to see his wife, hands her a toothbrush then says "When you're done cutting the grass, you can give the patio a sweep".