Sometimes when my husband wakes up after a short nap, he is very very confused and thinks I'm playing a joke on him. He thinks he is in a different house and there is no convincing him otherwise. He gets very upset and it takes a couple of hours before he calms down and then he is very sorry for upsetting me. I can't stop him takings naps, he 'cat naps' at least once a day and I did use to welcome this because I could then get on with something else but now I dread him cat napping.