I can't get him to eat me out! πŸ˜’πŸ˜’

Me and my SO have had sex over hundreds of times! And I think I can count on one hand how many times he has gone down there on me. I make sure it is clean and hair free but he just doesn't seem to like to go down there or stay down there.. but every time we have sex I go down on him first. It kindove bothers me any advice?