Plot: During a backyard party at the Swansons' house, Stewie gets into a fight with Joe's baby daughter Susie, who beats him up. Ashamed by the fact that his own son got beaten up by a girl, Peter takes Stewie to the gym to learn how to be a man. One of the instructors at the gym gives Peter some steroids to give to Stewie, who becomes incredibly buff and macho as a result. With his newfound girth, Stewie begins to revel in bossing Brian around until the steroids wear off, making his skin incredibly loose and flabby. Stewie attempts to commit suicide by jumping out of his bedroom window to avoid Brian's wrath, only to have his loosened skin help him glide to safety. By the end of the episode, his body seems to have returned to normal.