I am trying to analyze the picture.
so you're the kartöffel, and I am probably the one shoving you in... my other one? So from what I can crystallize out of this picture it's probably an expression of being "eaten" by me. However, I don't really see in what way I would eat you since we're very good friends and I don't think that I put you on pressure or eating you. The point where I shove you as kartöffel in the mouth of the other one can be a sign that I push you into stuff - which I also don't do, at least I don't do it anymore - and that "eats" you internally. I don't understand it.