I read this book a very long time ago (perhaps about 20 years back), hence limited recall.
It's sci-fi, the part I remember has a character who is piloting some kind of spaceship/fighter and part of the technical lore involves making use of implants to push past normal human limits (including for sexual recreation). I remember something specific about one of the characters using an implant to be ready for sex immediately rather than waiting for a few minutes.
This story is NOT The Gap Into series by Stephen Donaldson. Unfortunately cannot remember much else, it's one of those I'll know it when I see it things.
edit: Thanks everyone who commented. I've updated the question with further information in response above, and will go through the FAQ prompts here with responses to commentators below:
Media: I think it's a fairly chunky novel (at least an inch thick paperback), I can't recall if it's part of a series (although this is likely), if so, it's likely the first book only I read.
Year of publication: Not sure, would be published before or during late 90's.
Major themes: All I can recall is space stations, piloting space ships, space in general, some military contexts, but non-military also. Detailed technical world-building.
Language: English/American English
Target audience: Adult sci-fi, definitely not written for teens
NOT: I don't think it's Asimov, Clarke, Dick, Herbert, Orwell, Verne. All others are possible.
The Culture novels and Delaney/Asaro's books seem like strong contenders, I am going to go skim them to see what seems familiar. Regarding the type of sexual content, I don't recall anything too crazy (i.e. no threesomes, alien sex), but it may well have featured light to medium BDSM (i.e. orgasm denial, enhanced sensation).
I don't recall pirates in the story, for that matter also no zombies. Perhaps aliens, I don't recall. I am definitely going to read all the works mentioned below though (particularly Hamilton's books, reow).