Crosses the Line Twice: The only approval Jerome gets out of his parents is when he lies to them about having a girlfriend. His bratty sister tells him it's because "They were starting to think you were a homo."
True Art Is Incomprehensible: In-Universe. A running gag in the movie is how the most banal and thoughtless junk receives nothing but praise while Jerome, the only artist who's work seems to follow any kind of conventional form, is criticized for drawing "like a machine."
Similarly, every time Jerome gives his opinion on a certain work, whether or not he wants to, his response is almost always criticized na´ve and uninformed.