One day, a man comes home from work and greets his wife. Upon seeing him, she asks for $20 to buy meat for dinner.
He leads her to a mirror, holds up the $20 bill and says to her, "Honey, the $20 in the mirror is yours. The other belongs to me."
Satisfied with his "ingenious" remark, he sits back and the incident is forgotten.
The next day, he comes home and greets his wife.
When he goes in the dining room, the table is laden with meats and delicious foods.
Shaken, he asks his wife where she got the money.
She leads him to the same mirror and lifts up her skirt. "See that pussy in the mirror? That one belongs to you. The other belongs to the butcher."