If you want to stay young-looking, pick your parents very carefully.
This humorous quote by Dick Clark is referring to youth. If a person wants to stay young, they should pick their parents carefully-- which is impossible, as we do not get to select our parents. Therefore, this quote can be seen as a humorous 'joke.' Genetics and environmental factors has a major influence on our aging process. We get our looks from both parents, and when we are older, our appearance will be a combination of how our parents are aging. If you are curious about your appearance in 20 years, pay close attention to your parents. Also, it would be wise to observe their mistakes, environmental factors that affected their health and appearance. If your parents failed to use sunscreen and followed a healthy diet, take steps to avoid those mistakes.
Source: abcnews.go.com. April 18, 2012 (Link)