"We've"? You may internalize whatever you'd like, but I don't think judging sex scenes by necessary or unnecessary is even a realistic metric at all. Movies are an art form. That's like saying, Renoir had to many extra people in his paintings, not all of them were necessary. I personally prefer more explicit sex scenes woven into movies about intimate relationships and I think watching something like a tiger disembowling someone is in my opinion less than necessary. Just show the tiger and then maybe a body bag or something. But that's completely just a personal preference, no we shit.