My notion of a wife at 40 is that a man should be able to change her, like a bank note, for two 20s.

The quote "My notion of a wife at 40 is that a man should be able to change her, like a bank note, for two 20s" by Warren Beatty uses humor and irony to make a statement about aging and relationships. Beatty, an American actor and filmmaker known for his flirtatious persona and complex relationships, suggests that at 40, a woman becomes something that can be "exchanged" or replaced, much like a bank note being traded for smaller denominations. This implies a superficial or transactional view of relationships, especially as it relates to the aging of women and the societal pressures placed on them to remain attractive or valuable as they grow older.

The quote reflects a cynical view of marriage and youth—suggesting that, in a relationship, a woman’s worth is reduced as she ages and is replaced with something more “useful” or appealing. By comparing a woman to a bank note, Beatty plays on the idea of value being tied to physical appearance and the perception that a woman’s worth can diminish as she gets older, especially after reaching a certain age. The use of "two 20s" implies that a woman is worth less as she ages, subtly referencing how society tends to value youth over experience.

However, the quote is also a commentary on societal norms and the expectations placed on women to maintain their physical beauty throughout life. Beatty’s tongue-in-cheek remark may not necessarily reflect his own values but rather point out the unrealistic expectations that society holds regarding the aging process, particularly for women. It highlights the objectification of women as they reach certain age milestones, such as 40, a time when society often questions their appeal or relevance.

Ultimately, Beatty’s quote uses sarcasm and humor to expose the flawed thinking behind the way people, particularly women, are valued as they age. While meant to be provocative, the quote serves as a reflection on how society’s expectations of beauty and value often clash with the reality of aging, highlighting the superficiality of such judgments.