The parents among us will be the first to admit that keeping your kids clean can be a massive pain in the backside.
Whilst appearing on Dax Shepard's Armchair Expert podcast, the pair revealed they've passed on their own bathing habits to their kids, six-year-old Wyatt and four-year-old Dimitri.
Kunis told host Shepard: "I didn't have hot water growing up as a child, so I didn't shower much anyway.
"But when I had children, I also didn't wash them every day. I wasn't that parent that bathed my newborns - ever."
Kutcher added that on a daily basis, he just uses soap and water on just his 'armpits and crotch' and 'nothing else'.
You might be thinking - but what about after a big sweaty workout?
Well, the former Two and a Half Men actor explained: "I do have a tendency to throw some water on my face after a workout to get all the salts out."
Maybe not quite the answer we were looking for.
However, there could be some scientific justification for their wash-averse behaviour.
According to healthline.com, it can be a good thing for children to regularly come in contact with germs, with the site advising: "Children are supposed to come into contact with germs.
"This is the only way their bodies learn how to fight off bacteria and viruses, which can cause illness, so a few germs left behind after a day's play isn't all that horrible."
Fascinating. And it doesn't end there - avoiding washing your kids' hair can also be beneficial. The website claims that clean hair can be more of a potential issue.
"If your child is in school or attends day care, head lice are always a possibility; and, believe it or not, head lice prefer immaculately clean hair, like the hair of a child that is washed every single night.
"So, if you do decide to go the daily bath route, you do not need to wash your child's hair every day."
Healthline also stresses that it is ok to wash your child every day too and there are 'no medical reasons why you shouldn't'.
The article adds that: "A bath before bedtime is a great way to relax a child, and is a great start to a wonderful bedtime ritual."
So whether you're a famous celebrity couple and don't like washing your kids, or you just prefer youngsters to bathe regularly, it seems like there is room for both methods.
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