My Boy needs a haircut

My wife has been fighting with me over whether or not we should cut our baby boy's hair. Everyone knows it is too long but my wife feels that if we cut it, he will look too grown up and that would make her too sad. She claims that we must let his hair be because he is her baby boy. Since when is a lack of hair signify growning up? Oops, maby she is right, my picture definately says OLD!