It looks like someone is shopping TWO Kanye sex tapes.  One is 20-mins long and the other is 40 mins.  And I hear he "goes"  the entire time... whoooooa  there bull man!

It's definitely a Kanye sex tape because he sets up the camera at the beginning, and looks right into it at the end.  He also makes sure the woman clearly states that she's 18.

She also tells Kanye, "My husband and I don't have sex anymore . . . that's why I'm here!"

The two of them have sex in various positions, but don't kiss or interact verbally.  Kanye does wear a condom. 

Sources say Kanye is, "freaking out", and does NOT want the video out there.  Obviously, it could be worth MILLIONS.  The website Sex.com has already offered $1 million for it.

But Kanye is trying to make sure nobody sees it.  His legal team says the video was STOLEN from his computer.

And they issued the following warning, "Posting, advertising, marketing, displaying and otherwise disseminating the [tape] constitute actionable violations of Mr. West's rights of privacy and publicity."

There's also a screen shot making the rounds that supposedly comes from the tape.