It's not a good idea to refer to dementia in a light-hearted way, as part of general forum banter. The scourge of dementia has affected too many of our loved ones for it to be mentioned casually, as you did. I can understand why
SpiderSpurs
got arsey with you. Probably best to try to understand it? There will be quite a few people here who have been unable to prevent a family member from slipping gradually into the hell-hole that is dementia. Times have changed - the word is no longer 'acceptable banter'.
Hope you understand.