The Hedonistic Castrators of Sex Nexus Nine
This is free right now. I'm just guessing, but I assume the book's trash, but what a great title!
Book description (NSFW)
When the giant vagina appears in the sky, Jack Sumpthin climbs it, falls in and is transported to the planet of extraordinary sex. On Herenou, he discovers the Herbies are having their sexual organs systematically harvested by the dominant race of Castrators. Sex Nexus Nine, the intergalactic womb-hole fueled from energy created from massive sexual orgies, is their plea for help. Jack’s quest brings him in contact with sex trees, the Blowbirds of Happiness, sperm races, telekinetic strip clubs, living thinking dildos, masturbation propulsion and the terrifying castration machines. And who is the other Earthling that has already been on Herenou for centuries?