Age is strictly a case of mind over matter. If you don't mind, it doesn't matter.
Jack Benny was an American comedian, vaudevillian, radio, television and film actor, and violinist. Recognized as a leading American entertainer of the 20th century, Benny portrayed his character as a miser, playing his violin badly. In character, he would claim to be 39 years of age, regardless of his actual age.