Chyna's Famous Ex -- I WON'T Watch Porn Sequel

Former WWE wrestler X-Pac - who co-starred with them in Chyna sex tape 2004 - said he absolutely refuses to watch his new movie XXX. "It's too hard to remember how she was devastated the first time."

X-Pac - real name Sean Waltman - which tells us: "It saddens me ... but it obviously did not make much headway in life. "

As we reported, Chyna has recently concluded an agreement with Vivid Entertainment to release a new porn movie starring the former Playboy model in some compromising positions with several professionals with males.

Sean adds: "[Chyna] used to say how she felt weak after the first [sex tape] was released ... What does that say about where she is now in life? "