Final answer:
The major characters in 'Button, Button' are Arthur and Norma Lewis. Their backstory is not explicitly mentioned, but it can be inferred that they met through a common friend or social event. Their jobs are briefly mentioned, with Arthur working at a company and Norma being a housewife.
Step-by-step explanation:
The short story 'Button, Button' by Richard Matheson features two major characters, Arthur and Norma Lewis. Arthur is described as an average-looking man in his thirties, while Norma is described as a pretty woman in her early thirties. Their backstory is not explicitly stated in the story, but it can be inferred that they met through a common friend or social event. As for their jobs, it is mentioned that Arthur works at a company and Norma is a housewife. The story focuses more on the moral dilemma faced by the characters, rather than providing extensive details about their past.