Generally speaking, psychologists will say that as long as a sexual fantasy stays in one’s head and it doesn’t harm anybody, nothing is really off limits. Still, even the most sexually liberated might baulk at the latest genre of steamy porn novels: monster porn.

Women and Japanese schoolgirls have been getting every single orifice penetrated by a supernatural being or a giant octopus for years in the world of cartoons and 3D animation. As of late, however, this niche genre has taken a giant stride towards mainstream.

Titles such as Mounted and Bred by the Mermen, The Horny Leprechaun, Mating with the Jungle Plant, and The Apemen Cumeth are readily available on Amazon.com.

After movies like Twilight and Underworld and shows like True Blood, the interest in exploring porn with supernatural creatures has piqued. From aliens to krakens, goblins, ogres, lizards, and even plants, nothing seems too weird to screw.

The short synopsis for Mating with the Jungle Plant reads: “Dr. Elizabeth Morrel is exploring the rainforest in search of the rare ontalya plant, which may be the cure for cancer. When she finally discovers it after months of searching, she’s suddenly overtaken by unexpected horniness. As she seeks relief, Elizabeth realizes that the ontalya is more than just a plant, but actually an alien creature looking to breed with her. Will Elizabeth help the creature with its sexy plan or try to escape its grasp and abandon her research?”

The powers that be over at Amazon have realized what several of their self-publishing authors are up to and have started a purge of their virtual book shelves to get rid of what they deem “offensive” content.

Virginia Wade has had huge success with her e-book series about female campers going to Mt. Hood National Forest in Oregon, where they are kidnapped by Bigfoot and ceremoniously raped in every which way.

Her books have been pulled several times by Amazon, mainly due to the graphic descriptions of what the readers can expect if they purchase her belles-lettres. Also, she’s had to change several names of titles. Cum for Bigfoot was eventually pulled, but made its way back to the shelf when Wade changed the title to Moan for Bigfoot.

Amazon’s content guidelines state that the company doesn’t accept “offensive depictions of graphic sexual acts.” To elaborate on this policy, the company offers this explanation: “What we deem offensive is probably about what you would expect.”

Smashwords, another online platform for self-publishing authors didn’t clean house. Its founder and CEO, Mark Coker, said: “Where do you draw the line? Sex with beasts is a common theme in paranormal romance. Do dinosaurs need to be a protected class of animal? What about Sasquatch? When are they real, when are they not, when can you have sex with them and when can you not?”