For scat, the way it's done is there are 3 cleanings first, and then they inject/pump in...cake batter. I forgot what it's called for the cleanings, but they basically put warm water in and clear everything out. You can actually get this at certain health specialty services, they also will check the waste for health issues. So actually if you see it in a video it's not actual shit, which again, will make you severely ill and likely kill you. Even then it's very niche, very regulated, and there's still a lot of health checks and concerns.
There is nobody that actually does real scat. It's just not biologically possible.
I’m a little reluctant to carry on given how adamant you appear to be, but in the spirit of friendliness and to counter misinformation and misunderstanding, I’ll make a couple of points and give you one more source in case you’re interested
Your description of how scat porn is created is simply incorrect. Or at best, what you are describing is how fake scat porn may be made (but not in a way I've ever heard about)? Have you got a source for what you’re saying? Have you actually seen most scat porn, specifically F/m scat porn? There’s a good selection on Europrofile, both professional and amateur, and it's pretty clear it isn't fake (you can almost always tell when it is).
I wanted to avoid personal anecdotes in my original reply, as really I could just be making up examples to match my preconceived ideas. This is why I linked two of the best sources for objectively and unequivocally evidencing your discussion to be based on misconceptions and pretty much wrong on all counts. Both mention scat play as a very small but prevalent part of the two BDSM related ranges explored. However, for whatever it’s worth (and as with F/m relationships) I’ve had a pretty good amount of actual real life experience with scat play, and I’m almost certain I’m not dead, nor an example of a biological impossibility. It isn't hard to get access to a BDSM community in real life or online, and there’s really a massive amount of examples to be gotten pretty quickly and easily.
Again, I’m not calling you out or trying to pick a fight, but you seem to be expressing absolutes without much basis in fact or actual examples/experience. I get why you think what you do, it’s pretty ingrained social and biological conditioning right, and something we all have. Even most people with the fetish retain this conditioning, although it changes the more you engage with it. A significant part of BDSM culture is similarly and inescapably created on playing, bending, breaking and subverting these types of conditioning. I’m wondering if this may point to the problem you seem to be having with the idea that people can and do engage with this kink in relative safety (for whatever reason, on this topic you can't get past the conditioning)?
There are of course risks with scat play, and it can very obviously lead to harm and death in the worst case scenario, as can a good number of other BDSM activities (or any number of other popular activities in life). But these risks can be managed and significantly reduced, to the point where they are almost negligible (there’s always going to be the potential for something unforeseen, but that’s life).
Here’s a link to the best reddit community for the fetish, and while there’s a chunk of fantasists posting, there are a large amount of people who engage in this regularly. There is a lot of talk about safety, etc., and is very much worth checking out.
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It’s okay to find something disgusting and repulsive, and to keep the view that this kink is dangerous and shouldn’t be done, but don’t let that cloud your critical thinking and reasoning.
**Edited just after first posting as I caught a couple of spelling mistakes – it’s mega early, I’m in a rush so even less likely to make sense than normal!