A man and two women are transformed by a sexual hell. A bit dark, but funny too. Set in my home town, not the hell part, hehe. Think of what teenage boys dream about and you can imagine how they are transformed.
A starship captain renders aid to a stranded traveler, he gets kidnapped and taken to a planet where he is subjected to intense pleasure. He quickly realizes that he'"and countless other men across the galaxy'"are being subjugated to provide their seed... as virile fuel for an evermore energy-hungry society.