It was banned but copies still went around North America (not sure about other continents),Pre internet days at that. Definitely qualifies as cult classic in that regard. Word of mouth is a powerful thing.

Faces of Death (1978)

The first viewing was full of shock value.

After that it was not my cup of tea. Repulsive on many levels.

Now that subject matter is just a normal Tuesday on Reddit.

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Always heard she was a bit of a cunt.