I guess there are different flavors to this. Some do dumb stuff. My dad once tried to put the coffee filter on the gas stove to cook water. It has been 3 or 4 years since we had a longer than 4 word sentence that was coherent come out of him, and he knew it, and that was the worst, he saw it happening to him and could do nothing!
I didnt go yet today, (30 miles away from me), but my sister did, and he is up and 'talking' to all the ladies, and they are surrounding him as if he is their new boyfriend or something!! My Mom got a kick out of hearing that,too.
He is a happy alzhiemers in a way, he likes to sleep a lot. Fortunately, if he falls in the shower now, my 76 year old Mom doesn't have to pick him up anymore!