Mila Kunis, Ashton Kutcher, Kristen Bell & Dax Shepard Play "Never Have We Ever" -- Who's Waxed Each Other's Body Parts?!
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Mila Kunis and Kristen Bell get a big surprise when they stop by "The Ellen DeGeneres Show" on Friday.

The "Bad Moms" costars are first treated to a special Mother's Day video from their husbands -- Ashton Kutcher and Dax Shephard. But the actors up the ante even more when they join their wives on the show to play a game of "Never Have We Ever."

It turns out they’ve all hooked up on set (obviously!), and they’ve all helped to "groom" their spouse’s body parts.

"I was pregnant. I didn’t groom him, he groomed me when I was pregnant, right before I went to the hospital," Kunis says of her "That '70's Show" costar.

And when DeGeneres asks if they have been in handcuffs, Shepard admits that he has, but Bell exclaims, "He’s talking about another partner, Ellen!"

"No, no, no, no I’m talking about the police and stuff," Dax quips.

Ellen also asks her guests if they've "used each other's toothbrushes without telling them" or if "they've fallen asleep making love."

Check out the hilarious clip below to get all the dirt!

Before their hubbies crash the interview, Mila and Kristen talk about adding to their beautiful broods. While the "Frozen" actress is happy with her two kids, Kunis says she's ready to give daughter Wyatt a sibling.

"Are you trying?" DeGeneres asks. "Like am I having sex?" Kunis says with a laugh.

"Yes, I want to know how often," the host teases. "Like yes, not like that, but yes," the actress replies.

Mila asks Kristen to "distract Ellen," but her sex life is all anyone can talk about. "How's the sex? You brought it up," she says. Ellen adds, "That's a great question. I imagine it's good."

"Yeah," Mila says. "It's great."

Watch the video below to hear even more!

Want more of Mila and Kristen? Check out the first trailer for their upcoming flick, "Bad Moms," below.

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