Cartman and Kenny learn from the 5th graders that "milking" a dog is possible, when it is in fact just stimulating the dog to the point of ejaculation. They show the act to Stan and Kyle, who are impressed. Stan performs the technique on his own dog Sparky in front of his parents and their friends during a book club meeting, for which he is grounded for ten months. Stan cannot understand why he is being punished, as his parents are too embarrassed to explain sexual stimulation to him, and decide that the school should be responsible for teaching sex education.