I think it depends whether you’re reading straight up porn or erotica, since erotic writing is more character driven, and that tends to be what I want from my fanfiction, when I consume it. In any case it’s extremely rare to see multiple orgasms written well, but that’s just my opinion.
I’m not sure you’re asking the right question. If I’m answering this as a reader, and you’re the author, I’m countering with: how did you hook me into your story? Was it the promise of porn/sexual gratification, or something more? Did you make me curious about the consequences/aftermath or make me want more? Because those things are the job of the author. If you hook me right, I will read it.