The romance between Melissa Rivers and porn king Steve Hirsch has officially come to an end.

Sources close to the former couple tell us the two recently called things off ... because they each had too much stuff going on in their personal lives to focus on a relationship.

We're told the split was mutual ... very amicable ... and the two are still friends.

TMZ broke the story ... Hirsch -- president of Vivid Entertainment -- began dating Rivers back in December after meeting through mutual friends.

Now that Melissa has dabbled in porn, the possibilities are now end-less.

Octomom's topless photo shoot didn't completely sabotage her porn future ... but it did drastically reduce her XXX market value -- this according to a brand new porn offer from Vivid Entertainment.

In case you didn't know, Vivid honcho Steve Hirsch offered Nadya Suleman $1 MILLION in 2009 to star in her own skin flick -- but Octo turned him down.

Hirsch made a second offer in 2010 to help bail her out of foreclosure -- $500,000 for ONE hardcore scene -- but Octo rejected that too.

Now, in the wake of Nadya's topless photo shoot, Hirsch is making one final push to lock the mother of 14 into a porn contract -- except this time ... he's not offering 7 figures ... OR half a million ... not even close.

Hirsch sent Octo a letter yesterday, offering her a paltry $100,000 to appear in THREE hardcore sex scenes -- claiming, "Regrettably your market value has diminished."

She might need the money, but don't count on Nadya chomping at the bit any time soon -- Octo called in to TMZ Live yesterday, and seemed pretty adamant she'd never do porn in a million billion years.

The kingpin of porn has reached out to Hulk Hogan in an effort to entice him to change his mind about the sex tape that has surfaced featuring the famous wrestler.

Steven Hirsch from Vivid Entertainment has sent Hulk a letter, which touts his company's stable of stars who include Kim Kardashian, Kendra Wilkinson, Tommy Lee and Jimi Hendrix.

After we broke the story that Hulk is front and center in a videotaped sexual encounter with a mystery brunette, he was adamant that he had no idea he was being taped and he would go after the people behind the tape both civilly and criminally.

Hirsch tells Hulk in the letter ... he admires what Hulk has accomplished and then says he saw a "teaser" of the tape and believes there would be a "huge demand."

Huge or not ... Hulk and his lawyer could not have been clearer on TMZ Live yesterday ... they don't want that tape to see the light of day.

Melissa Rivers is used to the awards show circuit, but now that dates porn king Steven Hirsch ... those awards show have a more XXX feel to them.

Rivers and Hirsch hit up the AVN Awards (pretty much the Oscars of porn) in Las Vegas last night. The couple happened to run into Joe Francis in the lobby of the Hard Rock Hotel, where the show was being held.

Just imagine the questions she and mom Joan could have asked last night ...

A British woman who's become a celebrity in the U.K. because she was born with two fully formed vaginas may finally be able to cash in on her crotch ... TMZ has learned she's just been offered $1 MILLION to bone on camera.

Her name is Hazel Jones -- and the 27-year-old beauty has been making the media rounds across the pond to discuss "uterus didelphys" ... a condition which caused her to develop 2 sets of female reproductive organs. In other words, two vaginal canals with two openings. 


Hazel recently told British tabloid The Sun that she's not shy about her condition -- insisting she and her husband have shown it off at sex clubs around the U.K.

Enter Vivid Entertainment honcho Steve Hirsch ... who heard Hazel's story ... and immediately reached out to the woman with a MASSIVE offer to film her double hoo-ha in action.

In the letter, Hirsch writes, "You are obviously an extraordinary woman and I would like to make you an offer to star in an upcoming Vivid production. We would pay you up to $1 million for your services."

For the mathematically challenged, that's $500k per vagina.

To sweeten the deal, Hirsch says Jones can pick any XXX partner she wants in her movie -- adding, "We would fly you out to L.A. as soon as you are available and provide you with first class accommodations."

We're told Hirsch has not heard back yet.

Dating a porn king has brought Melissa Rivers into the adult film universe -- and now one company wants her to take it a step further, and make an adult tape of her own!

As TMZ first reported, Rivers is now dating Steven Hirsch the head man at Vivid Entertainment ... a company famous for selling celebrity sex tapes.

But another adult company, PornHub.com, has fired off a letter to Rivers to see if she and her new BF would be interested in filming a tape for them. The company believes it would be the first sex tape to feature "a sexy Jewish American Princess."

Some barriers are never meant to be broken.

Joan Rivers couldn't be happier her daughter is dating the god of sex tapes Steve Hirsch -- telling TMZ Live, Melissa Rivers and her new XXX man are a perfect fit ... in more ways than one.

Joan tells us, not only is Steve crazy about Melissa -- "He makes a great living ... and he's Jewish."

But Melissa -- who hooked up with Steve through a friend -- isn't the only one reaping the benefits of her new relationship ... Joan adds, "I'm 78 years old and now I get a discount on lubricant."

TMZ broke the story -- Melissa and the Vivid honcho have been dating for a couple weeks now -- and sources tell us ... "The relationship is going great."

Joan Rivers' only daughter Melissa has been meeting with the king of celebrity sex tapes Steven Hirsch ... but it ain't to star in a XXX flick, TMZ has learned the two are actually dating.

Sources close to the couple tell us Melissa -- who runs "Fashion Police" on E! -- has been dating the Vivid Entertainment honcho for a couple of weeks ... after meeting through mutual friends. 

One person with direct knowledge of the situation tells us, "The relationship is going great."

Hirsch has brokered nearly every major celebrity sex tape on the market ... including Kim Kardashian, Shauna Sand and Chyna ... but he's never starred in one ... so don't get your hopes up.

Vivid Entertainment president Steven Hirsch thinks Sasha Grey is the porn version of Jackie Robinson ... hoping she's opened the door for other adult stars to read books to kids.

As TMZ first reported, Sasha read children's books at Emerson Elementary School in Compton on November 2 as part of the Read Across America program. Even though we have photos of Sasha reading to kids, a rep for the school denies she was ever there. 

Regardless, Hirsch fired off a letter commending the school for allowing Grey to appear. In the letter, Hirsch offers up two of his stars -- Chyna and Allie Haze -- as possible future volunteers.

So he's saying there are three porn stars who can read? Who knew? 

It was only a matter of time, but Amanda Knox has already gotten her first offer from a porn company -- but there's a HUGE twist ... because this deal offers CASH without having to show ASS.  

Vivid Entertainment honcho Steve Hirsch tells TMZ, "We would like to offer her the opportunity to be our vivid.com spokesperson and represent the studio at trade and retail events."

He adds, "This would involve no nudity or sex.  Of course we would welcome talking to her if she wants to pursue this direction, but the decision is totally hers to express."

So far, we're told Hirsch is still waiting for a response.

The mystery buyer gunning for Kim Kardashian's sex tape came up short where it matters most ... in the wallet ... because Vivid Entertainment has officially REJECTED his $20 million offer to take the tape off the market.

Vivid honcho Steve Hirsch tells us, "We were offered $20 million for the Kim tape but have decided that we are going to hang on to it ... for now."

He adds, "Although the offer that we ultimately received was substantial, when I realized that it wasn’t Kim it became less appealing. Kim is a superstar and if it were to be sold, it should be to her."