Yes, my girlfriend knows, as do various friends of mine.

I kept it all very secret before I first told my girlfriend that I have a cannibalism fetish, which I did shortly after she told me about her ageplay kink and wanting me to take a "Daddy" role for her. She needed a bit longer to process mine than I did for hers, but it all worked out, and we've mixed in some roleplay and stories here & there for each other.

Given the good reception I got, I opened up more to some of my friends in the BDSM community, and didn't really get any negative responses. (There were some with questions, some who were indifferent, and some who were also into it.) I've since designed a scene that uses rope, a meat tenderizer, hot wax, knives, and biting to roleplay a sort of oven prep, and have even done the scene in public dungeons on some of my friends in the community. There's no real harm, of course. I take all of the safety measures I can.

My girlfriend also finds it sexy for me to lick her blood off of her, or her other partner's blood off of her, so I greatly enjoy occasional needleplay scenes with them. (She has an Owner/pet relationship with her other partner. We're poly, so multiple partners are a thing.) Licking their blood is the closest I'll likely ever actually get to cannibalism.

Obviously, mine is not a common situation as my partner isn't vanilla either. We're both sadomasochists (enjoying both the giving and receiving of physical pain). I haven't opened up about this stuff to any of the vanillas I know because that's probably still a bad idea. My relatives know I'm poly, and my mom & brother know I do BDSM, but that's as far as their knowledge goes.

My long term on again off again gf was kind of creeped out at first but then a while later we were both on amphetamine and drunk and I showed her guro pics while we were having sex and she liked it, it's not really shocking because we always did BDSM stuff, she's very submissive

I'd be a little warier about showing a new gf it especially if she was closer to my age now, I'm 32, it seems like people get easier to offend and less open minded as they age