John's favourite question was "Is it Thursday?", and he asked this so many times in an hour, every hour, every day, that if I had a £ each time he asked it, I could solve the National Debt of several countries, at a stroke.
It took me a long time to learn, but eventually I realised that saying "no, it's Monday", wasn't helping him at all, and just making me rigid with frustration, when he would then say "oh, so tomorrow's Saturday then". And we would start again.
How did I manage for so long, and still stop myself from climbing the wall? I agreed with him.
The penny dropped, that it would make no difference whether I corrected him or not, so I just said "yes", and he was so pleased, cos he thought he was right.
When he insisted on playing with the remote, trying to change channels, whilst holding it upside down, though he no longer knew what it was for, I closed my eyes, and asked him to help me fold towels or something. When he said he was fed up with me having affairs all the time - I apologised.
When John was in the mid stages, and kept asking me what was happening whilst we were watching a TV drama, and was that man having an affair with the woman who had the knife or the one with the hat, at the crucial moment (neither had a knife or a hat), I realised that if I wanted to watch something, I'd best record it, and watch it on my own when he was in bed.
When, in the depths of winter, he accused me of destroying all the flowers, so he had nothing to look at from his chair, I went to several garden centres, bought silk flowers and oasis, and "planted" 3 pots in a prime position for him, covering the oasis with compost.
But over the years, I went Up The Wall on many an occasion.