Help finding a story

There was this story I read a year or two ago that I can’t seem to find anymore. All I can really recall is that the guy straps himself to this like… advanced milking/fucking table. There was some sort of tablet esk device where he could select session length and number of orgasms until getting released from the machine. Of course, he fucks up, gets locked into *way* too many orgasms, and is stuck in the machine for days. I think it also had some electro stim stuff and urethral play. Hopefully that’s enough and someone knows what I’m talking about.