I think Strip Poker was the only "adult" game I ever played on the Commodore 64. I had a friend that had a copy so of course I had a copy. Eventually, I learned that you could just rename some of the files in order to see the naked girls...in all their glorious 16-color 320x200 resolution, lol.

When I started digging through the floppy disks I found at a thrift store a few years back, the very first one I looked at was full of porn. More amusing than arousing but I guess it hit different when the technology was new. Here's that post (warning, definitely NSFW, lol): @darth-azrael/digital-archaelology-codex-floppy-disk-1 - Geez, I can't believe that was like 8 years ago.