Useless Wife

My husband keeps asking to cum on me, my face, tits, Ass, on my pussy bit I'm not into that. I can't get pregnant so when we do have sex or anything he can cum in me and most guys love that but he wants more. He also links my ass sometimes and it's nice but weird. He wants me to blow him till he comes but then Where's the fun for me if I don't get sex out of it. He doesnt masturbate so when we do stuff there's a lot of cum and because of my issues we don't do it often which I think is what makes him want this stuff. I can't change myself not with my problems and I don't want him to change but is there anything I can do to help myself in this situation? Any help or advice is appreciated guys. I want to be good for him and there for him but I don't want to have to do things I don't like.