The advantage of this video, in my opinion, is, above all, its obvious, I would even say, deliberate staging, if I may be allowed to express such an opinion. Otherwise, the activity depicted in the above video is clearly obscene, unacceptable, and sinful. This is my opinion of it.
Come on, she was in pain! It's just that she hasn't had her asshole properly fucked yet! Once you get a group of students up your ass, you'll get a taste for anal. And then you can move on to the teachers. You'll be earning good grades.