When a 28yr old son moves back home, should he help with things around the house?

My 28 yr old son has moved into my home, I don't want or expect rent from him. In my home he has cable, air, food, several times I have taken and picked him up from his job, I pay someone to mow my yard also, this is all done after I have worked 3rd shift myself, again I still don't expect any type of monetary compensation from him, but I have asked him to do things in and around the house and yard for me, and he doesn't think he should have to do any of these things because he didn't do them, or I should do them myself and quit expecting people to do things for me example, a sink full of dishes, or planting bushes I have purchased, clean my car for me, little things like that. He works less than 30 hrs a week himself. It makes no difference what I ask him to do, he either argues that he didn't do them, or he will do them when he gets ready. Can I get some advice on what I should do about this and if I am expecting too much. I feel I shouldn't even have to ask him, he should do things he knows needs done. When I live alone, I do the things myself, or pay to have them done.