Ooof.
Ok. Okay. Okay okay okay.
This thread is making me realize how much of a sick fuck I am. So there are a very great many things considered "taboo" that I have used as jerk-off material more than once. The question is not that, though, the question is what you're in to, to the point of honestly considering it a fetish. To me, a fetish is something that significantly increases your enjoyment of sex or consuming sexual media. It should be something that gets you off way faster than vanilla sex does.
So in no particular order, here are my fetishes
1. Felching: Specifically, anal felching between women as part of a three(or more!)-some. If you don't know what felching is, it's the act of sucking semen out of someone else's orifice, and spitting/swapping/otherwise transferring the semen from the felcher's mouth to the felchee. I love it so much.
2. Ass to mouth or other girl's mouth: Of all my fetishes, this seems to be the one that's most common and perceived as the most "normal". I kind of wonder sometimes if this wasn't me seeking felching without knowing it, but I still seek it specifically sometimes.
3. Incest: I mean real incest between family members, btw, not this worthless step-shit that has filled up all the normie sites. Verifiably related people, the closer the better, fucking each other. Oddly, the easiest to find seems to be twin girls having lesbian sex, whether as part of a group thing or just them.
4. Forced orgasm: I don't know why, but I absolutely love to see a woman (or sometimes a man, depending on body type) restrained and forced to cum over and over until the line between pleasure and torture is entirely erased, along with the poor victim's mind and power of speech.
5. Facials: I love seeing a woman's face covered in cum, but not completely like in bukkake. More of the /r/cumsluts variety, where a beautiful woman has a more moderate amount of cum on her face and a sexy expression. Bold, smug, satisfied, and laughing are my favorites, but anything that shows enjoyment or enthusiasm is a winner.
What do I consider taboo? For me that's the same question as "what sexual acts are immoral or unethical?" My answer to that is the same criteria that the BDSM folks follow: anything that visibly is not safe, sane, and consensual.
Sorry for the long delay in response, this is my porn alt and so I don't check it as often as my main account. To answer your question, I used to think I might enjoy it, but at this point I realize it would have utterly destroyed my entire family. I still very much enjoy watching, such as the Dellai twins.