Casa Erotica is one of the Winchesters' favourite porn movie franchises.
When Dean returns to the motel room and Sam is sitting on the edge of his bed watching the TV. A voiceover on the TV can be heard saying "Next on the Skin Channel, Casa Erotica Four. A tale of two Latin beauties..."
When Bela turns up at 2am to ostensibly help the Winchesters, she asks what she's meant to do after handing over the African Dream Root, and Dean says: "Get a room. Ah, they got the Magic Fingers, a little Casa Erotica on pay-per-view. You'll love it."
When Dean is telling Sam not to do anything that would aid in fulfilling Chuck's prophecy of Sam and Lilith in the "throes of demonic passion", and Dean says: "I don't care what you do. Use the Magic Fingers or watch Casa Erotica on pay per view."
When Sam and Dean arrive their room at The Elysian Fields Hotel in , Dean is thrilled to find chocolates on the pillows and that "Casa Erotica 13" is on the pay per view. Later Gabriel gives Dean a "Casa Erotica 13" DVD and tells him to guard it with his life.
Sam and Dean watch the DVD, which at first appears to be a normal porn film, until Gabriel appears and tells them that they may be able to re-imprison Lucifer, and that the keys to his cage are the rings of Four Horsemen of the Apocalypse.
In Gabriel's Casa Erotica DVD, the action takes place in Room 69.