this is nose bleeding, this position is bad for people with low blood pressure and he did complain his head hurts. one of the last scenes including close-up of his ass and it is not torn.
while sex is pleasurable experience that can make you not feel pain immediately you should still be careful with anal and use a lot of lubricant as naturally this part of body is not producing body liquids, also your anal sphincter needs to be relaxed and open before you can penetrate anything
Oh I haven't thought about nosebleed. That might be the case... He said "it will tear" so I assumed...
Thanks for the lesson but I don't think I need it lol. Mucous membrane(?) is delicate, and can bleed easily, even with lubricant. Just as if you blow your nose too much, it can bleed.
I dunno about what'll happen next but a bit of blood during anal sex can be common if you go too strong. Like when the pleasure is so intense that you don't notice the pain anymore. It can be not as bad as it seems. Talking from experience.