I have not seen Tesis. Looks like it's about snuff porn like Serbian Film, 8mm or Confessions of a Porn Gang. And having never seen Alice Sweet Alice for it is rare for me to follow slasher films... You have films like Pretty Baby and both versions of Lolita and Valerie and Her Weekend of Wonders that deal with forbidden subject matter. As for the reverse you have Hard Candy, which I believe works very well. Also The Little Girl that Lives Down the Lane—where the creepy guy is antagonized. Which is different then an incest theme you see a lot in horror and artsploitation. Maps to the Stars explores that, but House of Yes does it better. These are all, agains sexually forbidden subjects a lot of these dark films hinge on and the dark subject is not DEATH but some sort of perversion sexually.