Guys like Ric Flair and The Undertaker just can't seem to leave "the business."

For gals like Tammy "Sunny" Sytch and Joanie "Chyna" Laurer, "the business" was just a springboard into successful porn careers.

Sytch's porn debut was released this week by Vivid Entertainment (Vivid.com) and was properly titled, "Sunny Side Up ... In through the backdoor." It's gotten mostly positive reviews from the non-WWE associated wrestling community.

Sytch is enjoying her new career so much that she even challenged now porn veteran Chyna to a match.

"Without a doubt she can kick my ass in the wrestling ring," Sytch told TMZ. "But I really don't think she stands a chance against me where it matters most. In the bedroom."

Chyna hasn't responded on her Twitter page and probably won't as she's stated that she's retired from her second profession (although this 'Yoga' video she posted this week is pretty weird).

Given all the WWE Diva - porn chatter, Torrie Wilson weighed in last week on whether or not she'll ever do porn. She told TMZ she never will "ever ... ever" but as Vince McMahon has told us for decades anything can happen in the whacky world of sports entertainment.

Wilson is looking great these days, posting the above pic on her Instagram account.