The mass production of birth-control pills in the 1960s is the basis for this British farce about marriage and infidelity, with the somewhat hidden moral statement that the pill has been developed to keep married couples from having children, not to encourage rampant sexual conduct. Kerr
and Niven, noted for their pairing in several well-crafted farces, are a married couple who have as little as possible to do with each other, including having separate bedrooms. When their niece switches her mother's (Redman) birth control pills for aspirin and Redman becomes pregnant, Niven
decides to try the same thing on Kerr. If his plan works, Kerr will become pregnant by her ...