Hugh Hefner has a reputation as a ladies' man -- and he's not about to let Crystal Harris ruin that.

Hours after his ex-fiancee, 25, told Howard Stern that sex with him lasted just "two seconds," the 85-year-old Playboy editor shared his side of the story on Twitter.

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"Crystal lied about our relationship on Howard Stern, but I don't know why," Hefner wrote on Tuesday (the tweet has since been removed). "Maybe a new boyfriend?"

Hefner then told one of his followers that "Crystal convinced me that she adored me. That was the first lie."

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"I feel sorry for Crystal," he told another follower. "She seems lost."

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Harris, who dumped Hefner just five days before their June 18 wedding, was allowed to keep her $90,000, 3-carat diamond ring -- and her pricey Bentley! The only thing Hefner wanted in return? Custody of his dog, Charlie, who is now back at the Playboy Mansion.

Tell Us: Was Crystal wrong to dish on her sex life with Hef?

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