This is super hot and also somehow super believable, like that's what two men who are absolutely stupid for each other would get up to eventually in 900 years, of course it is. I really liked the line "some part of him has decided that this is the hottest thing he’s experienced in several lifetimes, even alongside this man who can reliably turn his crank with a single glance or a twitch of his fingers. That part of him might be his cock."

Although, requisite disclaimer for anyone else reading: this is FICTION ONLY, peeing on a jellyfish sting DOES NOT WORK and depending on the kind of venom could even make it worse.