About T-Shirt Design
The joke on The Beatings Will Continue Until Moral Improves T-Shirt is easy to understand, and that is a big part of why it works. It fits really well with everyday humor, but you do not have to be obsessed with that stuff to enjoy the joke.
It works for casual days and holidays, but it is also the kind of shirt someone could wear whenever they feel like it. People who collect funny t shirts will probably like how quick and simple this design feels. This one is mostly about having a little fun with what you wear, which is kind of the point.