It's just a joke. There are plenty of similar, silly things in the US that are equally if not more outrageous.
Surpringly there are a large majority of them in Utah.
I dunno .... I sense it is not a joke at all. I mean in the sense that this 'humor' has any legs at all to start with.
Here's why. The fact this stuff can even be sold in Europe is the joke. Trying to sell that stuff here would never work....