American Dad! Episode 5.16 Bully for Steve

When Stan learns that Steve is too passive, he spies on him. Stan tells Steve that he needs to directly face his situations rather than shy away from them. Later, he confronts to Steve as a bully, explaining he is a wimp and needs to toughen up. Persistently, he inflicts physical harm to him and insults him with sexual jokes about his mom, disgusting him each time. Steve quickly figures out the bully is his dad during his first incident, and he reaffirms this again when he arrives home injured.