“Evil” as I am, I would suggest doing it selectively badly yourself. I mean, if *his* shirts end being pink just when *he* has that important meeting because he didn’t bother to do his own laundry, well, bad luck. Isn’t it? If he wants it to get done properly he could do it himself, right?

Or maybe he happens to have the dish that is still dirty while yours is clean. I mean that things happened and he just told you “it is not that important” so he shouldn’t be “picky”. And if you happen to break some of his collector pieces while cleaning the dust? oh, well, he shouldn’t bag you anput unimportant stuff. Funny how two people can play this game.

On the other hand, if he makes a mess cooking, he should clean the kitchen himself. That is the best way to learn how not to make a mess. conversely, you could cook and make a mess and let him clean everything.

Best teaching experience is allowing him to suffer the consequences of no one doing housetask decently.