Mr. Garrison
While Mrs. Garrison is moping in the park, the mouse with his penis shows up and allows itself to be caught, and Mrs. Garrison undergoes an operation to become Mr. Garrison again. He arrives back at school and explains that he now realizes that the true judge of gender is whether someone can get pregnant. The episode concludes when one teacher objects that his wife cannot have babies because of ovarian cancer, and Mr. Garrison responds with, "Well then get an AIDS test, Thomson, 'cause your wife's a dude, faggot!... Yeah! I'm back!" while jumping in the air as the mouse (who grew the penis) lets out a squeak.