Gives a good message
I found that this movie, though disturbing to some, can still give a good message and lesson to anyone who watches it: carnal desires can never be satisfied and eventually lead to ruin. For, the two characters, as they went deeper and deeper into physical pleasure, were found to become more and more mentally miserable. This is something that I think modern culture can learn from.
Favorite movie: Koyaanisqatsi