How to wake up an angry sleeper?

It is impossible to wake up my boyfriend with out him getting angry. He shoots me angry looks and mumbles things and just turns over. If I try again after a few minutes it just gets worse. I can't rub his back or stomach, give him kisses, or even touch him at all with out him getting angry. Throwing water on him or anything crazy like that definitely isn't going to work. Once he decides he wants to get up though he just sits straight up and gets on with the day. How can I wake him up with out getting him angry?