Why does Goober quit the football team?

Goober tells Jerry that he is going to quit the football team because he is disgusted by the state of things at Trinity, and is particularly upset that the unscrewing furniture prank that he was assigned caused Brother Eugene to have a nervous breakdown. Jerry tries to persuade Goober to keep playing football, but Goober refuses, saying that there is something rotten in the school. As Jerry continues to try to persuade him, Goober counters by saying "Sell the chocolates, Jerry." Jerry realizes that Goober's reasons for quitting football are not dissimilar from his own reasons for refusing to sell the chocolates.