Robert Munsch

Good Families Don't is Munsch's funniest book yet, about a risqué subject that is guaranteed to have children - and adults - rolling in the aisles. When Carmen tries to tell her parents that there is a big fart lying on her bed, they don't believe her. "Good families like ours, " they tell her, "do not have farts." But when they go upstairs to see, the fart attacks them - as it does the similarly disbelieving police when they arrive.
Carmen is left to deal with the situation on her own, which she does with the help of a rose.