Joan Rivers is a big fan of her daughter Melissa River’s porn industry kingpin boyfriend, Vivid honcho Steve Hirsch, and she told RadarOnline.com exclusively why.

“I think it’s wonderful because I know more about the porn business now,” Joan explained. “I could tell you who buys, what it’s about, what’s the latest technology, and every friend of mine is getting a tickler for Christmas.  Whether they want it or not.”

Melissa Rivers’ nasty breakup with her boyfriend Jason Zimmerman is the focus of this season of her reality show, and in this exclusive sneak peek obtained by RadarOnline.com,  she sobs when she learns about his online porn problem.

In the upcoming episode of Joan and Melissa: Joan Knows Best? Melissa is with her mother Joan Rivers and their whole staff is talking about websites, revealing the news that Jason was chatting with porn stars online and solicited sex on Craigslist.

Melissa Rivers let her 78-year-old mother inject her with fertility drugs — after practicing on an orange — and RadarOnline.com has the photos.

Granted, if anyone is familiar with needles, it's Joan Rivers.

Melissa Rivers had a nasty breakup with her boyfriend Jason Zimmerman last September, and in this exclusive sneak peek of her new reality show obtained by RadarOnline.com, he screams and swears at her in a vicious fight.

In the upcoming episode of Joan and Melissa: Joan Knows Best, Melissa and Jason begin an argument after he misses a family photo shoot scheduled by her mother Joan Rivers, and Melissa is furious.