just from the top of my head:
Molly and Case have sex on the second day they know each other and it's described in detail
Y.T. and Raven from Snow Crash have a complete chapter doing it (and she is a fifteen year old teen at that, would be an extrem taboo nowadays but it isn't a big deal in snow crash)
altered carbon, dude altered carbon is full of this stuff
and let's not even talk about ghost in the shell and sex in cyberpunk anime in general
I forgot the Molly/Case sex scene. Just the one? In the whole book? Yeah, that's not much. And I think it was, a) not half as explicit as, say Witcher 2 or b) actually pretty artsy. Colours and crap. And if it had been left out, would the story have been ANY POORER for it? No. Ask Gibson - he has a blog.
Snow Crash...not my idea of a Cyberpunk classic, actually. Way too tongue in cheek, kind of lacks the Punk. I know many regard it as one, though. Altered Carbon does have lots, sure.
Now would you like me to list all the Cyberpunk fiction that DOESN'T have explicit sex? Or the percentage of sex-to-story in Gibson's works or Walter Jon Williams works, having just re-read Voice of The Whirlwind?
Because it's a lot of not-sex. Oh, sex is alluded to, since it's a story about humans, and occasionally you'll get an erotic sentence or even a paragraph. But that's it. Rudy Rucker, Bruce Sterling, Blade Runner, lots of Philip K Dick's stuff..can't remember if Shirley or Effinger have much if any sex, pretty obviously not story-significant..
Max Headroom, no, Terminator 1 and 2 has one semi-explicit scene for both movies, Alien and Aliens no, Mad Max, one brief flash of sex near the start, Road Warrior..I think no? do we count rape, I hope not....Total Recall, not really...Robocop no.
Those are just reading from the Cyberpunk 2020 what to read/watch list.
GitS has some sex, sure, although not the movie iirc, and the manga, well, you know Shirow has a "thing" about hot girls. No sex in Appleseed, though. Was there more than just the once scene in the GitS manga even? Just the one on the ship, right?
Point i'm making is, explicit/revealing sex is not integral to Cyberpunk. Nor is swearing, for that matter. They aren't part of the Cyber or the Punk. Yes, it's all very sex-y and sex is part of the equation, but the story is not served in any way by making it explicit. It's just not. And the above cyberpunk stories, all excellent, ( still not too sure why Alien and Aliens is on the list, really, but whatever), and few if any having any explicit sex, make that point.
Explicit sex is about titillating your audience - it's not a necessary part of cyberpunk. Fade-away scenes are fine.