I have this cologne that I know my wife dislikes. And I’ll randomly wear it to see how good her sense of smell is (she can sense a cat from across the street). This gets her to tell me something mean, then I have an excuse to say something mean too, and then we begin a bickering-match, all to make sure we stay on our toes.
If you ever wonder what colognes are good for…there is so many more hidden secrets.