I am a big fan of Curb your Enthusiasm and that kind of "cringe" humor, and this is very much in the same spirit. Only dirtier and at times quite juvenile. But the jokes are not really juvenile, but rather uses sexual situations and ideas as a source of embarrassing situations. And it works quite well.
While Curb your enthusiasm has some sort of realism, it's also often really over the top and playful. Klovn is at times like this, but what impresses me the most is that no matter how bizarre the situations are, they usually manage to build up to it in a way that feels realistic. They have established characters that you believe can make the worst decisions in the worst of circumstances. Maybe the point where the realism breaks is how accepting and open the friends and families of the Frank and Casper are. I