I have a boyfriend that seriously thinks I have a serious problem because I dont like watching bloody, tv show?

He likes shows like True Blood, and Spartacus, Gladiator type movies, I really dont like them. He thinks I seriously need therapy and brings it up in arguments like there is something seriously wrong with me, and I must have an underlying past tramatic issues to not want to watch with him. What do you suggest I say to him, or do I have a problem????