It was decided that horror should be universal. Belkar and Miko is only horrific if you are familiar enough with the characters...and if extreme ooc-ness is horrific to you. Roy/Julia is only horrific if you know they're siblings.
But poor, naked fairies being fed to Shambling Pubic Mounds by spitefully jealous bards (and seriously, what is that flag?)...tentacle monsters with a penchant for entranglement followed immediately by intrusional probing...that's disturbing whether you know who the poor saps are or not.