I'm all for a fade to black as an option and absolutely believe the devs need to read Niara's critique of the sex scenes.
But I am 100% in favor of the "cartoon pr0n" - because Larian has decided to do much its storytelling in the form of cinematics and these scenes contain important aspects of the story. Encouraging Astarian to bite you . . . allowing it . . . forbidding it. All important for the romance. The morning after scene with him basking in the sunlight and you reading the elaborate scars on his back - all important. I suspect that Wyll's scars also tell stories . . .