In Sweden, the back of milk cartons tends to contain little texts of some didactic ambitions, like about various sorts of cows. (Hence the nickname "The people's university" for them.) Cartoonist Max Andersson did a couple of excellent cartoons satirizing these little lessons, and this is the best of them.
The text ells us that twice every year, the Midnight Cows walk the streets, searching out drunks, druggies and homeless, and turning them into butter.
The absurd heartlessness of the text coupled with the cute little cows in the picture and the wholesomeness of the milk carton texts it satirizes makes this one of the best cartoons I've ever seen.