Searching in my knowledge, "The Carnal Sutra" might be a title of a film or book. Wait, there's a 1987 film called "A Night to Remember" which was a 1958 film, but that's not it. Alternatively, "The Deviant Sutra" by Dho Nguyen is a book about tantric sex practices. Maybe the user is referring to that? But they mentioned 1987. Let me think again. The user wrote "The Carnal Sutra Mat 1987". Maybe "Mat" is a typo for "Mate" or "Mat" as in a yoga mat, but that seems off.