A favorite of mine is a movie called Little Shop of horrors there are about 3 different renditions of the movie but

I chose the 1980s version while it seems light-hearted because its a musical it is very disturbing. The story starts off with a man named Seymour who works in a plant shop one day he receives an odd-looking flytrap over time it speaks to him asking for nourishment which starts off with his own blood but convinces him to murder civilians in the neighborhood for more. I think this encases the spirit of perverseness as he willingly does so for his own benefit as the plant becomes a major attraction to the shop and impresses his love interest.