Names of animals to which humans are likened are not neutral. These have either postive connotations like “a man like a lion” or negative connotations like “rat like”.
A fox is the animal which is known to have to cleverness as well as being handsome. A silver fox is referred to a man who has transitioned to old age with white or partially white hair and look very handsome.
Some Hollywood actors which are in more demand and have a huge fan following seemed to have become more attractive with age.