The part of Susan was written specifically for Stark Raven.
Stark Raven's first role. The director cast her after seeing her in a college play. It was also her first nude scenes, which she said she had no issue with because none of them felt exploitative, except maybe the shower scene with Flora Fauna.
During an interview, Stark Raven said the scene she found most difficult was the gun fellatio scene in the cemetery during the dream sequence. She didn't quite understand the point of it and it made her uncomfortable. She didn't see the need to be sacrilegious just for shock value.
The explicit scene where a gun is shown being inserted into Stark Raven's vagina was not filmed with a body double. The actress agreed to do it herself as long as nobody else was present in the room during filming and that the shot remain only a closeup on her genitals and that her face not be included in the sequence.