Squick: Ich bin ein ganz besondrer Mann (I'm a very special man) is a song about a man who learned to eat with his asshole. You can imagine where this is going and the song gets quite detailed about it.
True Art Is Incomprehensible: Probably applying to many songs, but "Und ging" seems to lampshade it for all its worth, combining highly melodramatic music and deeply emotional vocals with lyrics consisting enirely of random words. Possibly also a case of As Long as It Sounds Foreign, as most of thr words actually have a quite serious sound to them.