One Direction revealed some of their naughtiest secrets during a guest appearance on "The Ellen Show" on Wednesday to promote their new album "Made in the A.M."

The boys got candid during their interview when host Ellen DeGeneres decided to play a game of "Never Have I Ever" and Harry Styles made some big revelation about his previous sexual encounters.

The boys were each given a paddle marked on either sides with the phrase "I Have Never" and "I Have." They were to simply flip their paddles to either of the two phrases as answer to a series of questions read out loud by Ellen on the show.

One of the questions seemed to have bothered Harry, according to MailOnline, when Ellen asked, "Never have I ever made out with someone double my age." Harry could be heard in the video below complaining and asking, "What is this game" as the studio audience clapped and burst into cheers.

Harry didn't actually lift his paddle up so viewers could see his reply. But he kept it on his knee flipped to the "I Have" side.

Things turned more awkward for Harry when Ellen asked, "Never have I ever hooked up with a fan." Harry was the only one who answered "I Have" while the rest of the One Direction boys, including Liam Payne, Niall Horan and Louis Tomlinson answered "I Have Never." The 21-year-old musician could only give a cheeky grin as the audience burst into cheers of delight. He also managed to joke about his answer, saying "I think mine's (paddle) broken."

At the end of the game, Ellen thanked the three boys except Harry for their honesty. Meanwhile, Harry only laughed when told that he has to take the paddle so he'd learn how to play the game properly.

Harry grabbed headlines in the past for admitting that he had a crush on the much older "X-Factor UK" host Caroline Flack. The pair eventually became friends after being introduced to each other by a mutual friend. However, their friendship turned serious and soon Harry and Caroline were spotted on dinner dates.

The pair reportedly started a fling that happened back in 2011, when Harry was still 17 and Caroline 31. Both were also under Simon Cowell's management. However, they had to stop seeing each other after Harry was photographed coming out of Caroline's house early in the morning and the host started receiving threats from die-hard Harry fans.