A childhood belief about vampires

I used to believe that there were alien vampires. I always covered my neck with my whole blanket. I didn't seem to be bothered by the fact the the rest of my body was exposed for the vampires and therefore readily available for bloodsucking if they did come to my room at night. I still cover my neck out of habit when I sleep. I also thought the bogey monster had claws like a lobster instead of hands... would you believe stephen king wrote about the exact same bogey man? I wonder if he believed in the alien vampires too.