when you run your fingers through your hair, end up without your ring and then proceed to spend at least half a minute trying to find the ring somewhere in your crowning glory... it might be a subtle reminder that a haircut is due.
i didn't believe it at first so i sat there and tousled my hair. no ring anywhere. so i stood up and tousled. nothing dropped on the floor. so i then i started getting worried and i squatted on the floor, flopped my hair over my head and stared at my toes as i flicked strand after strand of hair to find my ring... i felt it a couple of times but couldn't find it. finally fished it out a while later.
for those of you who complain that you have too little hair, that your hair's too fine, that you're going bald... well, here's a perfect moment to gloat and feel good about not having a thick mane.