Answer:
Miss Prism. No married man is ever attractive except to his wife.
Explanation:
The story "The Importance of Being Earnest" is a classic example of comedy of manners. The story presents the picture of Victorian upper class society. The norms prevalent in the society at that time revolved around materialistic nature and superficial attitude. The Victorian society was much indulged in hypocrisy and frivolous nature. The materialistic nature and the norms of the society has been highlighted in the story.
The above line said by Miss Prism is an example of the feature of a comedy of manners. The importance of a husband has been only specified to his wife because of the materialistic support that the husband gives to the wife. The emotional aspect is not touched by this statement.
Answer:
because she understands that society, at the time, valued only a woman's appearance and not her intelligence. She also wants her to be a "fool" so that she doesn't understand this cruel reality.