For those wanting to understand the story without a full download, there are Hindi movie explanations available on platforms like Facebook and YouTube that cover the entire plot.
I should explain that "The Carnal Sutra Mat 1987" isn't a known title in mainstream media, and that dual audio versions typically refer to media with multiple soundtracks. The answer should caution against assuming the exact title and year, mention common titles that might be similar, and provide guidelines on legal downloads and safe practices. Also, highlight that downloading unauthorized content can be illegal and unsafe.
Another angle: "dual audio" typically refers to having two audio tracks in a video file, like English and another language. So, the user might be referring to a dual audio version of a 1987 film titled "The Carnal Sutra" or similar. But I'm not finding a 1987 film by that exact title.