Nora Ephron expresses a longing for the carefree days of youth in her book "I Feel Bad About My Neck." She reveals that she regrets not wearing a bikini during her twenty-sixth year, suggesting that women should embrace their bodies and enjoy life without hesitation. Ephron encourages young women to take advantage of their youth and confidence to wear a bikini freely.

This sentiment highlights the importance of self-acceptance and seizing the moment. Ephron's advice to wear a bikini until age thirty-four reflects her belief in enjoying one's appearance and making memories during a vibrant stage of life. Her words serve as a reminder to cherish the present and embrace our bodies at any age.