My dad is like that, he is 62 yrs old and there are times he behaves like a 4 yrd old.. My mom does not like that because he gets her in her nerves and some time it is embarrassing. He acts as if he is going back in time but he acts as what he does is correct and those kinds of attitudes are incorrect for a grown man. My dad is conscious what he does but he seems not to mind at all doing it, he thinks is funny and normal He is impatient, he is always in a hurry, he eats standing up when he has to sit down, he eats fruits with his bare hands and get stained all over depending on the fruit he is eating and some time he does that in front of relatives. Sometimes he gets on my nerves too because he does not pay attention to things that are good behavior. He says that so, lock him in a nursing home when he is much older, if we don’t put up with his attitude. Is not that, what happens is that he is a conscious man who acts like a boy and there are situations that grown up man don’t do. My dad is not crazy or nuts, he knows what he is doing, but he thinks we have to tolerate certain things that are inappropriate for an adult to do but for him is OK to do them and we have to accept, that is why he gets mad when we constantly criticize him for his behavior, but he we do it because what he does is not OK for an adult.