When reading inflation content/porn, do you prefer first or third person narration?

For me it would be like a pov where it's happening to me and I'm watching that other person inflating me

Third person is usually better in my eyes because perspective often affects narration style, and some of the best-told stories need omniscient, detailed, tuned-to-every-sensation kinds of writing to build the rawest sensuality. You can still kind of "mount the GoPro" on a single character's head to immerse the reader in all the feelings only one person would experience throughout the story, filter their interpretations through their personality lens (snarky, demure, etc.), and basically make it a first person minus the I pronouns (which is good storytelling advice anyway; nothing pulls me out than having the cameraperson switch constantly, especially experiencing the same exact things that just happened to a different character except maybe now I can read their mind too).

All this being said, first person has its place in most unique or immersive situations where part of the storytelling is what the narrator doesn't know about what's going to happen next. The most important change to a story I ever did was going back and revising almost the entirety of Blind Date because I decided the first sentence should be "I can't see." rather than "Kelsey couldn't see." Even if I was going to practice the GoPro-mounting exercise on this one, I think the history, personality lens, experience to the inflation as a whole felt more authentic with I -- though I think it also leaves readers with sight wanting more to feel in-tune with the whole experience.

Great topic.