So during novel group discussion we talked about the cover, so my opinion is David is the duck and Cathrine is the fish because he's not normal like the rule "no toys in the fish tank" he's the toy and the fish tank is sort of like social Interaction or like the places that are part of his life others would wonder that there's something wrong with him and he shouldn't be here he should be in a place where people go with that stuff because that's sort of the stereo type people think if you act drastically different than others mental then you belong in a mental hospital so (and for people who oppose because the duck has eyelashes and looks feminine that's a stereo type everyone has eyelashes)for the thing that Cathrine is the duck because she's the one telling the rules to David thats a good point but then she wouldn't belong so that's just my thoughts! :O)