I am terribly unobservant. Nothing to do with age in my case
Many years ago I had a boyfriend who grew a moustache. I wasn't keen but was polite initially.
Then one day I gave in and told him I absolutely hated his moustache. He wanted to keep it. Much grumbling.
One evening we were out for a meal and he kept looking at me oddly. Sort of expectantly. Wobbling his head around.
I asked him what on earth he was doing and in the end he pointed to the spot where the hated moustache had been. Hadn't noticed it had gone.
People have new kitchens, new cars, make changes and to me it means nothing. Never notice.
However I can spot a crooked picture a mile off.