yeah. that is what i thought and believe was the case is that your hairline didn't recede at all but i didn't word it better, lol.
when you said ...what is coating outside and inside reminds me i was a potato over 2 years and 10ish months ago. that was the last time i became a potato and haven't since but some people got the wrong misconception thinking i am still a potato when i am not. because i sleep too much on the right side of my head, probably like 90ish % of the time that i sleep on the right side turns me like this. not just sleep but even when i am awake sitting up, awake standing up, or awake walking, my head and body tilted to the right side of my body like 90ish % of the time too and the other nearly like 10% of the time, i noticed it and try to straighten my spine and head but its not as comfortable because of the head injury on the left side of my head. the left side of my head is lighter than the right side because of the injury that my head tilted to the right side because of gravity.
because of my head tilted to the right side when i am awaked and i sleep mostly on my right side instead of on my back that i eventually become a potato. and lately this past 6ish years, i did tried to sleep on my left a little and it works somewhat. like 90% or higher of the time my head tilted to the right when i am awake and sleep mostly on the right side when i am asleep, my head was like that 24 hours a day, 7 days a week that turn me into a potato.
2 years and 10ish months which was the last time i became a potato, they try to embarrassed me and they control me and made me blushed that i didn't dare become a potato anymore. i got embarrassed but i am not shameful because my head and spine wasn't straighten when i am awake and very, very, very rarely was i able to sleep on my back. even when i sleep on my back, its only like a short nap which is like maybe 15 minutes to like an hour and then i couldn't sleep on my back anymore that i usually turned to my right side of my body in order for me to sleep again. maybe like one out of like 5 years was i able to sleep on my back for the full sleep time of like 9 hours or so. and maybe like 1 out of 2 or 3 years was i able to sleep on my back for like 15 minutes to an hour which is like a short nap before i lost my sleep and i turn to my right side to sleep again.
explaining this today make me feel relieve and lighter. people still call me potato lately even though i wasn't anymore for nearly 3 years and they didn't understand why i think. thanks to you titan for bringing up about coating outside and inside which gives me an opportunity to clear up some misunderstaning. i feel better now.
anyway, you look like you could pass as a 22 years old person when you don't make facial expressions where you don't get wrinkle on your face but when you make facial expression, you look like your age somewhat though. still good genes though especially your hair which are still intact. sorry to hear that your grandpa has or had cancer and i hope he is doing well today.