Rule #34 of the internet says that if you can think of it, someone has almost certainly already made a dirty movie out of it.
Going by this list of unusual fetishes, there are some REALLY strange films out there.
Sploshing
Aka Wet and Messy (WAM).
Women (it’s almost always women) sit in gunk tanks and/or roll around in paddling pools filled with baked beans.
Gloopy.
Formicophilia
Get your rocks off by being covered in insects. But maybe… Read the full story