Best film ever with BDSM in the plot?
BDSM is still extremely taboo in mainstream films. The few times it is portrayed is usually as a joke to be ridiculed, or it's put in a completely negative light. Bitter Moon is one of the few movies that actually treats the subject with any kind of maturity or respect. I don't think Mimi or Oscar were either naturally dominant or submissive; to both of them it was just another exciting, kinky adventure that they eventually tired of. But when they were involved, it came across as real and passionate as any other torrid love affair. Oscar does an excellent job in his story of describing the need to worship a woman as far as you can when you're that infatuated with her. I've never seen another movie do it so well.
On a related topic, near the end of the film when Oscar is crippled, Mimi does a lot of humiliating things to him (i.e. bringing home a lover in front of him). Since humiliation is often a part of BDSM, could that have been a subconscious attempt by Mimi to relive the point when their relationship was most passionate? Just a theory.