
How to write Anal Fissures, Intestinal Rupture, and Colon Fucking from the top's POV?
Disclaimer for unglamorous discussion of gore in smut.
So, I'm writing a spicy (and by "spicy" I mean dead dove) M/M hate sex fanfic where the top intentionally ruptures the bottom's colon with his too well-endowed dick and a large amount of force. The fanfic follows the top's POV and doesn't once head-hop.
I've done some research and now I'm curious: how to best write such a scenario from the POV of someone who commits this act? As one fucks, does the 'texture' change once there's a fissure/lesion/rupture? There'd be blood, of course, but would there be anything else? I want to make this scene a bit more than just 'blood from the butthole' and 'bottom giving voice to his discomfort'.
PS: Don't worry, the bottom is a humanoid immortal with the ability to regenerate; he wipes away this injury almost immediately. Also, the smut is full-con – the bottom, being the aforementioned timeless immortal, gave his full consent to the guts rearrangement procedure.