OK, I watched it. It's easy to follow even if you don't speak any Danish - mine is appalling but the plot is obvious.
I thought it was funny in the way that kids will find poo and farts funny. John thinks getting his penis out will be cool but actually it never is and he is clearly an idiot, he is always in trouble, getting laughed at by everyone and having his dick bitten by dogs. He's really sweet.
The other thing that's funny, unintentionally, is how incredibly Danish it is. He's even in a red and white striped costume FFS.