My husband shows no interest in things he used to love. He doesn't "plan" anything.......just eats and sleeps and doesn't find any joy in life. With all the political turmoil on TV he comes across as quite "irritable" about the slightest thing. Does this sound like dementia? Anyone have any thoughts? (Oh, by the way, he has been smoking over 50 years and can't quit) He exhibits traits of Asperger's Syndrome also.