Joan Rivers: I’m ECSTATIC My Daughter’s Dating a Porn King

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.”