Ashton Kutcher and Mila Kunis have admitted that they very rarely bathe their children unless they "see dirt on them."

The couple, who share 2 children: 6-year-old Wyatt and 4-year-old Dimitri, recently discussed their relaxed approach to bathtime while appearing on Dax Shepard's Armchair Expert podcast.

Kunis and Kutcher talked openly about their own bathing routines, and why they've eased up on cleaning their kids daily.

"I didn't have hot water growing up as a child, so I didn't shower much anyway," Kunis said. "But when I had children, I also didn't wash them every day. I wasn't that parent that bathed my newborns – ever."

"Here's the thing," Kutcher threw in. "If you can see the dirt on them, clean them. Otherwise, there's no point."

Getty Images

Of course, people have a lot to say about their comments...

One Facebook user wrote: "If they didn't have the privilege of being this rich and famous, they'd be subject to all levels of judgment and social intervention for that. But because of their status, it's chalked up to be cute and quirky, I guess."

While another commented: "How tho? Okay, when they are newborns every other day or flannel washes can cut it but my eleven month old needs a bath every night. He is a grot bag, a snotty little grot bag with food all over him each mealtime. Touches everything insight including the cats bowl if I don't move it in time. I mean, even if you can't see dirt surely because kids are constantly rubbing their eyes and stick hands in mouth n nose it's better to give them a hose down each night. Plus it keeps your bedsheets fresher."

Kutcher also revealed that he uses soap and water on his "armpits and crotch daily," but "nothing else ever," before adding: "I do have a tendency to throw some water on my face after a workout to get all the salts out."

Although it turns out the pair aren't too laid back. They recently revealed that they had come to a mutual decision to sell a ticket to space that Kutcher had bought.

He revealed in an interview with Cheddar News that he's sold his space travel ticket. He had bought the ticket way back in 2012 for one of Virgin Galactic's space travel flights.

Kutcher talked about how it was his wife Mila Kunis who had encouraged the decision, stating: "When I got married and had kids, my wife basically encouraged [me] that it was not a smart family decision to be heading into space when we have young children."

"I was supposed to be on the next flight," he revealed. "I will not be on the next flight, but at some point, I'm going to space."

What do you think of their decision?