Holly Madison has shared the chilling reason why Hugh Hefner didn't want any Playboy models wearing red lipstick.
The 43-year-old television personality is best known for dating the late Playboy founder for seven years until they parted ways in 2008.
In case you didn't know, Hefner had numerous younger girlfriends who were living with him at the infamous mansion at any one time. He reportedly had sexual relationships with all of them, and the woman he chose to be his "main girlfriend" would change from time to time.
The Girls Next Door star - who was the former founder's main girlfriend at one point - has since opened up about her disturbing experiences at the notorious residence after she first moved in at the age of 21 back in 2001.
Speaking on a recent episode of the Ahead of the Curve with Coco Mocoe podcast, Madison revealed that the entrepreneur had strict rules when it came to the women living in the mansion, such as disliking when models wore red lipstick.
The former playmate believed that his aversion toward a rouge lip was a "control tactic," but added that girls that were new to the mansion would be allowed to wear red lipstick without any repercussions.
"When I was brand new, I wore red lipstick out a couple of times, and he didn't say anything about it, because when you were the new girl in the group, you were always treated well," she said.
Referring to a phrase she heard before, Madison said: "Somebody said, like, the higher up you are in a cult the worse you're treated because they want the new people to bond and feel into it."
After half a year of living at the Playboy residence - everything began to change. "It wasn't a big deal until, like, six months into it, when I was living in his bedroom and I was the main girlfriend that he felt like he had the leeway to yell at me over it," she revealed.
Madison then spoke about her theories as to why the millionaire publisher of Playboy magazine had an issue with the bold makeup look, stating: "I think he didn't love it.
"Because when he invented the concept of a playmate in the '50s, he wanted the women to look very young and fresh-faced because he felt like the look in the ‘50s at the time was very - he described it as 'somebody's older sister,'" she explained.
Explaining a little more behind Hefner's reasoning, she went on: "It was more sophisticated, fashion model, red lipstick. It was a lot of fabric and big skirts and everything, and he hated that. He wanted skimpy and fresh-faced and very young looking."
Madison shockingly disclosed that for Hefner, daring makeup was reserved for "older mature women" which was definitely not his type because "it wasn't, like, the barely legal thing anymore".
Hefner passed away in 2017 at the age of 91 and is currently resting at Westwood Memorial Park in Los Angeles, right next to Marilyn Monroe.
His death was announced by his son, Cooper Hefner, who shared in a statement at the time: "My father lived an exceptional and impactful life as a media and cultural pioneer and leading voice behind some of the most significant cultural movements of our time in advocating free speech, civil rights, and sexual freedom."