McDermott's also recalled a time when his son, Jack, once walked in on him and his now wife Tori Spelling having sex.
Dean McDermott made another surprising revelation: he once performed oral sex on a male friend when he was 10-years-old.
The "Slasher" star recalled the experience while speaking with comedian Jay Mohr on Monday's episode of his "Daddy Issues" podcast.
"You and I both. We both blew our friend when we were younger," McDermott said of Mohr, after the comedian noted, "I have sucked a d--- in my life or five," during the conversation. "That's the one thing we have in common," Dean added, "I found this out after seeing Jay's set at The Dime."
McDermott said, like Mohr, he was 10-years-old when he had "an encounter with [his] best friend." The actor added "that was kind of my in" to approach Jay after watching his standup. The two didn't discuss the subject further.
Also during Monday's episode of the podcast, which he co-hosts with Adam Hunter and Nicky Paris, McDermott revealed his son Jack once walked in on him and his now wife Tori Spelling having sex during the beginning of their relationship many years ago.
"When T and I first got together, I had Jack every other weekend," McDermott recalled, referring to his son from his first marriage to Mary Jo Eustace. "He couldn't sleep one night and -- we were making a lot of noise -- and... I just happened to be looking that way towards the door. I saw the doorknob turn -- I didn't hear it, I saw it turn -- and I was like, 'Oh, shit,' and then a crack of light."
The former "Chopped Canada" host quickly made up an excuse.
"I jumped off and sat on the edge of the bed," he said. "[Jack] said, 'Dad is everything okay?' and I said, 'Yeah, I just got a migraine.'"
McDermott and Spelling, who have been married since 2006, share kids Liam, 12, Stella, 11, Hattie, 7, Finn, 6, and Beau, 2. And according to McDermott, 13 years of marriage and five children haven't slowed them down a bit when it comes to bedroom activities.
"We go every day," McDermott said. "It never stops ... my wife is so f--king sexy."
"She's sexy as hell," he added. "I look at her, and she just oozes sexuality."