There seems to be a lot of mounting evidence (heh) that the alleged Marilyn Monroe sex tape — which sold this week to an unnamed businessman for $1.5-million — doesn’t actually exist.

The story behind the film, which shows Monroe performing oral sex on an anonymous man, is that memorabilia collector Keya Morgan discovered the tape’s existence while researching the star for an upcoming documentary.

The original belonged to an FBI informant who provided the bureau with a copy, which J. Edgar Hoover tried to use to prove that Monroe was involved with either John or Robert Kennedy.

However, it’s becoming increasingly clear that Keya Morgan is a bit of an opportunist who enjoys the spotlight himself. Namely that his documentary will push conspiracy theories about the star’s death, and even a bizarre name drop where he claimed to have dated both Mariah Carey and Renée Zellweger.

I’m not sure that I’d want to be connected to either of those two crazy broads, even if it meant I could be famous.

The most obvious hypocrisy is this, however:

Last month, he brokered its sale, leading the informant’s son to a wealthy New York businessman who wants to keep this unseemly part of Monroe’s past buried.

“He said he’s just going to lock it up,” Morgan said.

“He said, ‘I’m not going to make a Paris Hilton out of her. I’m not going to sell it, out of respect.’ “

Good intentions on the part of the buyer, which were totally ruined when Morgan told everyone about a sex tape that no one’s ever heard about. How is that respect?