need opinions

So this is just to see people's opinions. I was having a conversations with my fiancé about rape while married. He belives you can be raped or rape someone while married if the relationship is abusive or bad and they physically force you to. However, He said he doesn't think you can rape someone if you are married and in a healthy relationship. I said I think you still can if you really don't want sex and hey physically force you to. Then he made the point that sometimes I have sex with him when I'm not in the mood and he's had sex when he's not in the mood and it's never felt like rape. So he thinks hat you can't rape someone if you are in a happy healthy marriage because sometimes couples have sex even though they don't want to just to please their partners.