How come I can think of really gross stuff…?
You are what you think! If you always think of gross stuffs like vampires, lycans, werewolves or death or war or other gory stuffs, you probably some much time in your hands and need to do more physical or mental activities that are more positive and cheerful and have redeeming values to humankind. Join some advocacy groups, like building some houses for the poor and the downtrodden, the education of the less fortunate children, etc. You need to change your way of thinking so that you could be a better person. As it is, while you are not bothered by these things, you may perceive that your life is not actually going the good direction that you want to be. Or you could join some church groups to refresh your mind of things that are positive, like faith, hope, charity, mercy, grace, and above all about love. Good luck to you and God bless you.