I never saw this film, but read about it in a historical guide to sci-fi films borrowed from the library in the 1980s, so it is no newer than that. A man hooks himself up to a computer that he invented, which due to being able to read his responses can give him an ever more intense orgasm. As a result he loses interest in real-life sex, and ultimately the climax is so strong that it kills him. I don’t think it’s Brainstorm as the guy doesn’t die in that and the idea isn’t quite the same. It could be from any country. Any ideas? Thanks!