'Grace and Frankie' stars Jane Fonda and Lily Tomlin talk sex on 'Today,' totally embarrass Savannah Guthrie

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Jane Fonda definitely knows how to make others blush!

The Grace and Frankie star was a guest on TODAY Friday, where she and her co-star, Lily Tomlin, had no problem explaining the sex toy empire their characters start up in the all-new third season of their hit series, steaming now on Netflix. While the two were pros at keeping a straight face while chatting about vibrators, Savannah Guthrie couldn't keep her cool, turning beet red in the face.

WATCH: Lily Tomlin Says She's 'Trying' to Get Dolly Parton on 'Grace and Frankie'

"Now normally, this would be the section of the interview where I say, 'What is the premise of season three? What is this new business venture?'" Guthrie explained. "But I can't think of a PG way to describe what you're selling. It's a morning show! Kids are eating their cereal right now."

Despite the warning, that didn't stop Fonda from diving deep into the sex talk.

"They've probably gone to school already and at the end of season two, someone gives us presents and my present is a vibrator," she said. "Grace has never used a vibrator before and she ends up with carpal tunnel syndrome. And our families make fun of us, and we say we're going to go into business, and the business we go into is making vibrators for older women."

Screening For Netflix's 'Grace And Frankie' Season 3 - ArrivalsGetty

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"But the problem is, you see, Grace is a real business woman," Fonda continued. "[Frankie] can't even add up her checkbook. And she's into vaginal lubrication, which she makes out of yams, which I had thought was jam and put on my toast, but anyway, she keeps raising the wrong subject because I want to push with the vibrators."

But the conversation didn't stop there. Fonda then described the type of vibrators Grace and Frankie eventually sell, telling Guthrie and co-host Carson Daly that "the on and off buttons glow in the dark...the tip of it moves easy so you don't have to wreck your wrist" and they're "good for your neck...and back pain."

RELATED: 'Grace and Frankie' Set Out to Build Their Sex Toy Empire in New Season 3 Trailer!

ET caught up with Fonda, 79, and Tomlin, 77, at a special season three screening of Grace and Frankie at the ArcLight Hollywood in Los Angeles on Wednesday, where they revealed their secrets to staying youthful.

"You have to be in bed by 8, no martinis," Tomlin joked to ET's Leanne Aguilera.

Fonda chimed in, saying, "I don't know about the no martinis, but I get about eight or nine hours of sleep a night."

Last month, things were just as awkward on TODAY when Maria Shriver interviewed Lena Dunham about her final season of Girls. When the two started talking about Dunham's popular HBO series, the 30-year-old actress bluntly asked Shriver, "You saw a penis, right?"

WATCH: Lena Dunham Mortifies Maria Shriver During Live 'Today' Show Interview

"Well, I saw more than that," she replied, clearly embarrassed. "You caught me there for a second. I'm not sure if you're allowed to say that on television."

RELATED: See photos of Savannah Guthrie through the years:

25 PHOTOS
Savannah Guthrie through the years
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Savannah Guthrie through the years
NEW YORK, NY - MAY 16: Journalists Matt Lauer and Savannah Guthrie attend the 2016 NBCUNIVERSAL Upfront at Radio City Music Hall on May 16, 2016 in New York City. (Photo by Jim Spellman/WireImage)
NEW YORK - NOVEMBER 18: Court TV correspondent Savannah Guthrie attends Lucky Magazine's VIP Preview to benefit the Robin Hood Foundation at Gotham Hall on November 18, 2004 in New York City. (Photo by Fernando Leon/Getty Images)
SLUG: ST-MEDIA DATE: 05/21/2010 CREDIT: Dayna Smith/ftwp CAPTION: MSNBC's 'Daily Rundown' TV correspondents Savannah Guthrie and Chuck Todd during a live broadcast with Rep. John Dingell, at NBC studios in Washington, DC.
NBC NEWS SPECIALS -- Decision 2010 -- Pictured: Savannah Guthrie, White House Correspondent, NBC News during 'Decision 2010' on November 2, 2010 (Photo by Virginia Sherwood/NBC/NBCU Photo Bank via Getty Images)
WASHINGTON, DC - APRIL 29: Journalist Savannah Guthrie attends the People/TIME White House Correspondents' dinner cocktail party at the St. Regis Hotel on April 29, 2011 in Washington, DC. (Photo by Larry Busacca/Getty Images for TIME)
TODAY -- Pictured: (l-r) Savannah Guthrie and Matt Lauer appear on NBC News' 'Today' show (Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
TODAY -- Pictured: (l-r) Ann Curry and Savannah Guthrie appear on NBC News' 'Today' show (Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
TODAY -- Pictured: (l-r) Savannah Guthrie, Matt Lauer and Natalie Morales appear on NBC News' 'Today' show (Photo by Peter Kramer/NBC/NBCU Photo Bank via Getty Images)
TODAY -- Pictured: Savannah Guthrie appears on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 4310 -- Pictured: (l-r) Savannah Guthrie during an interview with host Jay Leno on August 30, 2012 -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
TODAY -- Pictured: (l-r) Savannah Guthrie and Al Roker appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
TODAY -- Pictured: (l-r) Savannah Guthrie and Matt Lauer appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
TODAY -- Pictured: Savannah Guthrie appears on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
NEW YORK, NY - JUNE 28: Host Savannah Guthrie on the set of NBC's 'Today' at the NBC's TODAY Show on June 28, 2013 in New York, New York. (Photo by Stephen Lovekin/Getty Images)
NEW YORK, NY - APRIL 09: Journalist Savannah Guthrie attends NBC's 'Today' at Rockefeller Plaza on April 9, 2014 in New York City. (Photo by Ben Gabbe/Getty Images)
TODAY -- Pictured: (l-r) Natalie Morales and Savannah Guthrie appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
TODAY -- Pictured: (l-r) Savannah Guthrie and Lady Gaga appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
TODAY -- Pictured: (l-r) Savannah Guthrie and Matt Lauer appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
NEW YORK, NY - MAY 14: Savannah Guthrie attends A Celebration of Barbara Walters Cocktail Reception Red Carpet at the Four Seasons Restaurant on May 14, 2014 in New York City. (Photo by Steve Mack/FilmMagic)
NEW YORK, NY - JUNE 20: 'Today' co-host Savannah Guthrie speaks to the crowd on NBC's 'Today' at the NBC's TODAY Show on June 20, 2014 in New York, New York. (Photo by Mike Coppola/Getty Images)
NEW YORK, NY - JULY 30: Matt Lauer and Savannah Guthrie attend the 'America's Got Talent' season 9 post show red carpet event at Radio City Music Hall on July 30, 2014 in New York City. (Photo by John Lamparski/WireImage)
SYDNEY, AUSTRALIA - MAY 04: Australian-born presenter, Savannah Guthrie poses for a photo inside an art installation before hosting NBC's 'Today Show' live from Australia at Sydney Opera House on May 4, 2015 in Sydney, Australia. (Photo by Don Arnold/WireImage)
TODAY -- Pictured: (l-r) Savannah Guthrie and Carson Daly appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
NEW YORK, NY - NOVEMBER 10: (EXCLUSIVE COVERAGE) Savannah Guthrie leaves NBC's 'Today' show at Rockefeller Center on November 10, 2015 in New York City. (Photo by James Devaney/GC Images)
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