Many of the play’s jokes are plays on language. There is a running joke about the writing on Winnie’s toothbrush. She struggles to read it, starting with “pure”, and progressively seeing more adjectives but not the key noun. Finally learning that it is made of “hog’s setae”, she presses Willie to define “hog”. His definition (“Castrated male swine. Reared for slaughter”) encapsulates his plight. They ignore the more unusual word: “setae” are stiff bristles, whose purpose on a worm is to grip the surface and help the worm move without going backwards.