Leaving each other little notes around the house is a cute and simple way to make your partner smile, and brighten their day a little. You can write how your love makes you feel, or that particular thing they do which makes you smile.
Alternatively, you could draw a picture of a man doing a poo and stick it to the coffee pot. I guess that everyone has a different sense of humor, but it doesn’t seem like his wife finds it that funny either. I can’t imagine she actually fancies the coffee that she’s made after seeing that.