Credit: Youtube

Turns out Dr. Ruth isn't the only senior citizen sexpert in town.

Last week, the "Three Grandmothers"--Teresa, Mary and Josie--took the world wide web by storm when a YouTube video of them watching Kim Kardashian's sex tape with ex-beau Ray J. went viral, garnering nearly 2 million views.

The three friends stopped by Anderson Cooper's show to discuss their newfound internet renown for an episode airing May 14.

"We don't watch pornography ever," Josie, 72, explained to Cooper, revealing that a coworker of hers was the first to bring up the sex tape's existence.

The women--all hairdressers at different salons, who make it a point to meet up regularly--were at lunch, when Terry, 81, asked her girlfriends for their opinions of Kim.

"[She] said, 'What do you think of Kim?' And I said, 'Well I know she's good in bed,'" Josie shared.

When Terry pressed her for more info, she told her pal, "Let me show you the tape on the internet."

The rest is soon-to-be web history. The women filmed themselves watching--and narrating--the X-rated footage, which leaked in 2007.

What did they take away from their sex-tape viewing party?

"[Kim's] good, she's good in bed, let me tell you," an emphatic Teresa told Cooper and his guest host, Niecy Nash.

"He was good too!" Mary, 72, interjected of Ray J., 31.

"Not as good as her," Teresa said, turning to her friend. "She was unbelievable."