Hah!
A certainly warm result of mug of rum.
Some basic thoughts on age beyond graying roots, or simple wrinkles is larger ear lobes, as they are on the parts of humans that continues to grow through out life in most people.
Actually with that unusual coloration, I imagine the hair might not in fact gray. but perhaps change to another pigment entirely.
That would of course be more in your wheelhouse to figure out.
Thank you for making this.