The credit for this challenge really goes to Cosmic Tuesdays, who was musing about what might happen to those who eat the fruits and vegetables grown on a Hellmouth.  Cursed orange juice; murderous artichokes; tomatoes that are perfectly fine until chopped together with local garlic, producing hallucinogenic salsa…

The challenge:  write a story about Unholy Guacamole from Hellmouth avocados.  Smut is, of course, appreciated.