Just when Charlie is happy practicing monogamy with Chelsea, she gets sick and he has no nurse her, which he finds disgusting. Alan gloats, now the golden boy tastes the 'joys of marital life', Berta sides with her atypically helpful and pharmacist Russell recommends string, even illegal stuff. When she's finally better, he catches her bug and the roles are reversed, again without sex, but he has nightmares of her cat Sir Lancelot.
—KGF Vissers