I think that is at least partly our media at work. I imagine games make it exciting. It is fantasy so why not be fascinated? Zombie killing is not real and it's practically celebrated. It's a release which is also what sex does. You're objectifying it. It has been going on with women for decades. If that rings true then I think you are ok presenting it that way although I completely understand why you would be hesitant. I would be too.