An old geezer in an old people's home takes a fancy to a woman who is also staying there. One day he plucks up the courage to go and talk to her and after a while he says he would like to make love to her. She agrees that when everybody else goes on a day trip they both stay behind at the home and get down to it.
The old man goes to the woman's room and asks her how she likes to be made love to. She tells him that she loves a man to go down on her and asks him if he would mind. He says he would love to do that for her and goes for it.
After about 30 seconds he comes back up and says that he is sorry but it just smells too bad down there. She thinks for a minute and tells him that it must be the arthritis. He looks and her confused and states that surely you can't get arthritis down there and even if you could it wouldn't cause that smell.
She says "No it's the arthritis in my shoulder; I can't wipe my arse properly!"