You should always respect other people's parents.
Tony and Mark are hanging out when Tony asks Mark to sleep over and Mark tells him that his parents wouldn't allow that.
Tony wants to respond to Mark's statement.
Tony tells Mark that he understands and that Mark should ask his parents in advance so that they might allow it in the future.
Tony tells Mark that he shouldn't care what his parents think and that if he was a good friend he'd stay.
Mark feels happy that his friend understands his circumstances and respects his parents wishes.
Mark is disgusted at how rude Tony is being to his loving parents and feels bad about being friends with Tony.