That's totally understandable and of course I fully agree.
There is a distinction to make between things that many of us love to fantasize - and sometimes to make some art - about, and things that can be done in real life, though.
My fantasies can be quite extreme but I've never had, and will never have, the slightest intention of harming someone for real.
Let's say that my very personal Mr. Hyde exists only in the realm of fantasy. The juicy bits that my sweetheart carries with her receive a completely different treatment ;-)
We are much alike in that regard. I never had the opportunity to do anything bdsm related in real life (and I'm a bit long in the tooth to start now), so my preferences are strictly about the fantasy world where the only limits are your own. My tortures\ fantasies are extreme, but even I have limits.
These are strictly my preferences for what turns me off in art, films, or photos.
Death of my victim. I consider it a sad waste of females. In my world they always live to suffer another day.
Dismemberment, gore, mutilation. A little bloodletting during torture is ok, but that's about it.
Scat, urinating, vomiting. No.
Underage anything. Enough said.
Any sex or tortures involving animals of any species. Just turns me off.
Shoes. Even in my youth I never liked seeing women tied up wearing shoes, especially heels. I have not changed my mind about that.
Shibari. Leaves me cold, if not actually bored.
Manga art.
Breast bondage. I was never a huge fan of it, and am even less so today. I would much rather see them tortured that turned into purple balloons. I don't mind large breasts really within reason, but I'm more interested in their shape than their size. I'm also not a fan of breast hanging in RL, and would leave that to the fantasy realm.
Anal sex. Doesn't appeal to me at all.
Rubber wear and fetish clothing. I can take it or leave it. My victims are always naked.
Hot irons. Though I favor medieval tortures, I avoid the red hot irons that mutilate the body permanently in my fantasy world. I'm not a fan of minimal branding in RL either.
Humiliation. In RL or fanatasy, it just turns me off. Being naked, helpless, and tortured is in itself humiliating, but forcing my victim to degrade herself just turns me off.
There are probably others that I can't think of right now, but I've covered most of them I think.