"Peter, Peter, Pumpkin Eater".
Pumpkin is a werewolf, named so as his penile head resembles a pumpkin. His girlfriend, Jasty, is a vampire. As we all know, vampires and werewolves regularly date.
Peter is a human.
In a plot that completely rips off "The Talented Mr. Ripley", Peter encounters and befriends Pumpkin and Jasty whilst they are bludging their lives away on Daddy's money, on the Riviera.
They think Peter a harmless sort of a chap at first.
Being a XXX adventure, there's lots of sex that doesn't have anything to do with the plot. Pumpkin and Jasty have sex a few times, Pumpkin meets some witch at a nightclub and fucks her, while Jasty does her lesbian scene with a wood nymph from Prague.
After sitting through all of that, the plot returns. Peter dopes Pumpkin up on Ketamine, and has his way with him. Poor Pumpkin is fucked off his skull on the drug, and hasn't a clue as to what is going on, when Jasty enters the room to find Peter sucking Pumpkin's pumpkinhead.
All hell breaks loose, as Jasty rips Peter's spine out of his back and then bites Pumpkin's penis off at the root.
As Pumpkin is a werewolf, he is rather strongly built, and doesn't take too fondly to having his dick bitten off by his bitch of a woman. The pain of it brings him back to his senses, and he throws Jasty out the window. She falls to her death, and then Pumpkin dies from blood loss.
The End.


