Another sex tape shows Kanye as a stallion!

A stallion:  Kanye West

Perhaps, here finally is why Kim Kardashian cannot get enough of rapper, Kanye West. A new sex video just emerging shows that the superstar is a 'marathoner'. 

The rapper is facing more embarrassment as another X-rated video is allegedly being shopped around which shows him participating in a 40-minute lovemaking session with a beautiful brunette.

Kanye was "freaking out" after the first tape emerged last week, featuring him and girl who looks like his current girlfriend Kim Kardashian, and this second recording is double in length.

TMZ.com reported: "Both tapes are impressively long - the first is roughly 20 minutes and the second is more than 40.

"And we're talking constant action. Seriously, the guy takes no breaks. It's incredible."

Both tapes were made before he started dating 31-year-old Kim - who was catapulted to fame after becoming the unwitting star of her own sex tape in 2007 when her ex-boyfriend Ray J released the recording.

The 'Stronger' hitmaker has called in his lawyers to stop any footage of the tapes from being released, and it is believed the material has been stolen from his personal computer.  

With regard to the first tape, his lawyer Lisa Buckley released a statement confirming it is Kanye in the video and warning against any party distributing images or clips from it.

She said: "Your posting, advertising, marketing, displaying and otherwise disseminating the stolen screen shot and/or other materials on the tape constitute actionable violations of Mr West's rights of privacy and publicity".