I'll see your story, and raise you....
I lived with my grandmother for a year when I was 16 years old. (she was 68) She had Alzheimer's Disease, and set fire to the curtains, and wiped her ass on the bath towels. Those were the good days.
I don't mean to make light of your what your grandma went through.. But it is quite a coincidence to me that you bring up the "wiping their ass w/ bath towels" thing.. When I was younger, my Aunt had some In-laws over from England.. and one of the guys went into the bathroom, and when he came out the hand towel was hung on the wall in its usual place but w/ a huge shit streak going down it.. I have always wondered, WTF?!?!?! As a kid, I just assumed it was an English thing
.. The funny thing is that after all these years, it randomly popped into my head out of nowhere yesterday, and left me wondering once again, WTF?!?!?!? I will never understand why this man did that, but I'm almost positive that he didn't have a good enough reason.. From what I remember, he was totally normal and healthy, except for that LOL.. I have never heard of such a thing until that day, and have never heard of it since, until now.. I wish I had a picture of what I saw when walking into the bathroom LOL.. It was totally baffling to see something like that.. especially because he hung the towel back up as if to display it.. LOL WTF?!?!?!
* It was a white towel too.. or close enough.