I think I read this short Sci-Fi story (or maybe a novelette) about 20-25 years ago. Can't remember where, and I'm sorry but I can't remember more details. It was probably published earlier, but I didn't get the chance to read it upon publishing as I was only fourteen 25 years ago.
It's about a space traveler that finds an "unknown" planet where sex is not taboo among human(oid?) colonists. The planet is rich and he wants it incorporated into the Galactic Empire (or something like that) only to find out that other people already know about the planet and are disgusted by it, they don't want anything to do with them.
I've tried Googling, but it always brings up some other works. Maybe I misremembered something, it's been a long time since I read it.