Jimmy Kimmel is convinced 'The Bachelor' Colton Underwood is not a virgin

Jimmy Kimmel is questioning Bachelor star Colton Underwood's virgin status.

The 51-year-old Jimmy Kimmel Live host stops by The Ellen DeGeneres Show on Monday and expresses his doubts about Underwood's sexual experience.

"Do you believe the Bachelor is a virgin?" Kimmel asks DeGeneres.

"Well, he says he is," DeGeneres replies.

"I know he does. I used to tell my mother that too. I think maybe that's the deal. Maybe he doesn't want his mom to know that he's been, you know," Kimmel quips. "If I were to announce, like, 'Hey, just want everyone to know I'm an adult virgin,' people would say, like, 'Yeah that makes sense. Yeah.' But you look at this guy and it's, like, there's no way he is. It's just impossible."

The conversation continues, with DeGeneres showing a shirtless picture of the 27-year-old Bachelor.

"I mean, look at him! That's not a virgin," Kimmel exclaims, before revealing Underwood declined completing a polygraph test.

"So, you think this whole thing is so that women are like, 'Oh, I'll teach you.' That kind of thing?" DeGeneres asks.

"Oh, I didn't even think about that angle," Kimmel says.

"You can't really be bad in bed if you're not compared to anyone. You know what I mean?" DeGeneres replies.

This isn't the first time Kimmel has questioned Underwood's virginity. When the former NFL player stopped by Jimmy Kimmel Live earlier this month, the late-night host questioned Underwood about whether or not he made it to the fantasy suite while filming The Bachelor.

"I will say the fantasy suite was the most pivotal week of my journey," Underwood admitted of the week where the final three contestants have the option of sharing a room with the Bachelor star for the night.

"You did go to the fantasy suite?" Kimmel asked.

"Yes, I made it to that week," Underwood jokingly answered.

Filming has been over since mid-November, which led Kimmel to believe Underwood is a virgin no more. "We keep hearing that you're a virgin, but you've probably had sex 185 times by now," Kimmel estimated.

"I don't know," Underwood said while blushing. "I don't know what to say."

"Wouldn't that be something, if you didn't know?" Kimmel teased. "Plot twist!" Underwood agreed.

"You know, if you come out of this thing -- I mean people have been driving you nuts with this virgin thing -- if you come out of this thing and you're still a virgin you might as well just never have sex ever," Kimmel told him. "You might as well forget it all together."

"I mean, I feel like for the longest time what The Bachelor's been known for is the journey for love and I think they're trying to angle it somewhere else this season," Underwood quipped.

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'The Bachelor' star Colton Underwood
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'The Bachelor' star Colton Underwood
THE BACHELORETTE - 'Episode 1406' Richmond, Virginia, whose past is inextricably connected to Americas rich history, is the backdrop for a defining week in Beccas journey. Jason and Beccas date takes the couple on a trolley tour around town, but the day ends on a stunning emotional note. Seven men pay homage to Virginia, one of the cradles of democracy, as they take a history quiz and then participate in the Beccalection 2018 debate. Leo and Becca take a spectacular aerial tour of the state and try their skill at shucking oysters. Australian country superstar Morgan Evans caps off the night with a special performance. One bachelor mounts a shocking late-night surprise which may decide his fate with Becca. Which men will be on the right side of history? Find out on 'The Bachelorette,' MONDAY, JULY 2 (8:00-10:01 p.m. EDT), on The ABC Television Network. (Paul Hebert via Getty Images) COLTON
THE BACHELORETTE - 'Episode 1406' Richmond, Virginia, whose past is inextricably connected to Americas rich history, is the backdrop for a defining week in Beccas journey. Jason and Beccas date takes the couple on a trolley tour around town, but the day ends on a stunning emotional note. Seven men pay homage to Virginia, one of the cradles of democracy, as they take a history quiz and then participate in the Beccalection 2018 debate. Leo and Becca take a spectacular aerial tour of the state and try their skill at shucking oysters. Australian country superstar Morgan Evans caps off the night with a special performance. One bachelor mounts a shocking late-night surprise which may decide his fate with Becca. Which men will be on the right side of history? Find out on 'The Bachelorette,' MONDAY, JULY 2 (8:00-10:01 p.m. EDT), on The ABC Television Network. (Paul Hebert via Getty Images) COLTON
LOS ANGELES, CA - JULY 17: Former NFL and 'The Bachelorette' star Colton Underwood attends Regard Magazine's celebration of the ESPY Awards and their Special Annual Sports Edition at private residence on July 17, 2018 in Los Angeles, California. (Photo by Robin L Marshall/Getty Images)
BACHELORETTE - 'The Men Tell All' - The most memorable bachelors from this season - including Chris R., Christon, Colton, Connor, David, Jason, Jean Blanc, John, Jordan, Leo, Nick and Wills, as well as Christian, Jake, Joe and Kamil - return to confront each other and Becca one last time to dish the dirt, tell their side of the story and share their emotional departures. Finally, as the clock ticks down on Beccas journey to find love, a special sneak peek of her dramatic final week with Blake and Garrett is highlighted, on 'The Bachelorette: The Men Tell All,' MONDAY, JULY 30 (8:00-10:01 p.m. EDT), on The ABC Television Network. (Paul Hebert via Getty Images) COLTON
LOS ANGELES, CA - JULY 17: Colton Underwood attends Monster Energy Outbreak $50K Charity Challenge celebrity basketball game at UCLA on July 17, 2018 in Los Angeles, California. (Photo by Allen Berezovsky/Getty Images)
BEVERLY HILLS, CA - AUGUST 07: Colton Underwood attends the Disney ABC Television TCA Summer Press Tour at The Beverly Hilton Hotel on August 7, 2018 in Beverly Hills, California. (Photo by Jon Kopaloff/FilmMagic)
UNIVERSAL CITY, CA - AUGUST 08: Colton Underwood visit 'Extra' at Universal Studios Hollywood on August 8, 2018 in Universal City, California. (Photo by Noel Vasquez/Getty Images)
SCOTTSDALE, AZ - AUGUST 10: Reality TV star Colton Underwood poses for photos on the red carpet during The Aesthetic Everything Beauty Expo Trade Show at The Phoenician on August 10, 2018 in Scottsdale, Arizona. (Photo by John Medina/Getty Images)
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