The song is a satire of Catholic teachings on reproduction that forbid masturbation and contraception by artificial means. The sketch, called "The Third World", is about a Catholic Yorkshire worker played by Michael Palin, with his wife played by director Terry Jones. They have sixty-three children, who are about to be sold for scientific experimentation purposes because their parents can no longer afford to care for such a large family with the local mill being closed. When their children ask why they should not use any form of birth control, or why the father cannot perform self-castration, their father explains that this is against God's wishes, and breaks into song, the chorus of which is: