Some good one-liners to use for someone's 60th birthday are, "At 60, your birthday suit requires ironing," "People say you look great," and then add "for your age," and "At 60, your narrow waist and broad mind have changed places." Common topics for one-liners at this age include cracks about the person's virility, health, memory, bodily functions and how very long a time it has been since he was young.
Many 60th birthday one-liners talk about the aging process of the body, including wrinkles, sore bones, gaining weight and general aches and pains. This is the age when folks find that one ailment often leads to another, as in the joke, "At 60, your wife suggests you pull in your stomach and you get a hernia doing it."
It's only natural that a person's sexual prowess declines with age, and many observations suggest that rather than fight it, it's better to laugh. This sentiment is expressed in the joke a 60-year-old might make at his own expense: "The only reason I would take up exercising is so I could hear heavy breathing again."
Many good one-liners have been written by celebrities and authors as they became senior citizens themselves. Approaching this important milestone, Mark Twain said, "I’m pushing sixty. That’s enough exercise for me."