"I have the body of an eighteen year old. I keep it in the fridge"

This quote by Spike Milligan is a humorous method of revealing the idea that he is aging. By saying he has the body of an eighteen year old, he is indicating that he is no longer young which his body is no longer as vibrant as it once was. By saying he keeps it in the fridge, he is making a joke about how he is maintaining his body in order to stay young. This quote is a funny way of expressing the idea that aging is unavoidable and that no matter how hard we attempt, we can not stay young permanently. It is a pointer to appreciate the time we have and to make the most of it.