I first saw this film over 20 years ago. At that time, its graphic depictions of sexual activity were unheard of in a mainstream movie. And even now, in the age of a proliferation of internet porn, there is still nothing to compare, in main stream films, with the graphic sex scenes in this film.
That being said, if anything, this film might put you off of sex, not invite you to consider it. Sex becomes an obsession for the two main characters, taking over their lives completely, with devastating consequences.
The plot of the film is based on a real life incident in Japan, so when it was originally released, the Japanese public could most likely relate to it as an elaboration of "the news".
Beautifully filmed, unsettling, engaging. "In the Realm of the Senses" is a unique classic.