Subjectiveness In sexuality

From what I can really understand from this article is that sexual experience is subjective. I liked the part where she talked about what makes an MD or a PHD able to talk about whats normal in the sexual experience. And really, nothing does. Just because someone has a medical degree doesn't really mean that person can say what makes me or anyone else happy sexually. Obviously, some certain sexual acts are literally against the law (rape), but other than that who really has the authority to say what is normal or acceptable sexually. If one person really enjoys using food in bed (like that one person mentioned in her letter) then who really cares? I mean, if you personally don't enjoy that say so, and maybe you guys can find a happy medium maybe you can't but it doesnt make that person wrong for enjoying certain things sexually. It's like saying one way to play poker is inherently "better." I would agree that one's experience in poker is subjective, whether they like 5 card or texas hold em or what have you.