Ashton Kutcher and Mila Kunis became a trending Twitter topic this week and it's all thanks to their bathing habits -- or lack thereof.

The couple appeared on a recent episode of Dax Shepard's "Armchair Expert" podcast where the conversation briefly took a turn to discuss hygiene and they revealed they don't wash their bodies on a daily basis.

"I don't wash my body with soap every day," Kunis, 37, admitted, before adding that she does hit the hot spots like underarms, chest and private parts. "I didn’t have hot water growing up as a child, so I didn’t shower much anyway."

Kutcher, 43, added, "I wash my armpits and my crotch daily, and nothing else ever. I got a bar of Lever 2000 that delivers every time."

The habit also extends to the pair's two children: 6-year-old daughter Wyatt and 4-year-old son Dimitri.

"When I had children, I also didn’t wash them every day," Kunis said candidly. "I wasn’t that parent that bathed my newborns -- ever."

"If you can see the dirt on them, clean them. Otherwise, there’s no point," Kutcher chimed in.

Although the "That '70s Show" alums, who married in 2015, don't wash their entire bodies on a day-to-day basis, they do wash their faces. Kunis does so twice a day and Kutcher does it after a workout "to get all the salts out."