A Spanish memorabilia collector named Mikel Barsa is trying to get $500,000 at auction for what he claims is an 8-mm Marilyn Monroe sex tape, shot when she was "an underage actress." It's six and a half minutes long, and Barsa told the AP that it's the exact same as a 16-mm version that surfaced in the 90s.

But one Marilyn Monroe expert isn't convinced of the film's authenticity because, well, he's creepy:

"That's not Marilyn. The chin is not the same, the lips are not the same, the teeth are not the same," said Scott Fortner, who has a sizeable collection of Monroe memorabilia, including a belt he said proves how much more petite she was. "Marilyn was a tiny little thing. And I know that for a fact. I own her clothing."

Just taking a stab in the dark here, but I'm guessing Fortner also likes to walk around his house with Marilyn's underwear on his head singing "Diamonds are a Girl's Best Friend." Again, that's just speculation.

[Image via Getty]