Yeah I think @Motiman nailed it. Chinese ghost stories (unlike Western horror tradition) doesn't focus on scare so much as bewitchment and temptation. Classic ghost stories use gold, and other treasures and of course sex and even love to tempt the victim(s) of a haunting. Or it seems in this case the reason the ghost is haunting this world is the need for sex.
So it might just be a classic oriental horror film which happens to be more explicit than usual when it shows the mechanics of the haunting. If you understand the purpose of the film is to haunt/scare/disturb you the viewer, than the sex scene is just to exploit your desires, not to satisfy it. Sex with a revolting being (ghost/undead/possessed/deformed) is part of the theme.
Same as H.R. Giger, I love his art, but have never jerk off to them. I think of myself as having a strong libido, but I doubt I can keep up a good erection in a cold wet hole.
So it might just be a classic oriental horror film which happens to be more explicit than usual when it shows the mechanics of the haunting. If you understand the purpose of the film is to haunt/scare/disturb you the viewer, than the sex scene is just to exploit your desires, not to satisfy it. Sex with a revolting being (ghost/undead/possessed/deformed) is part of the theme.
Same as H.R. Giger, I love his art, but have never jerk off to them. I think of myself as having a strong libido, but I doubt I can keep up a good erection in a cold wet hole.