An AMA thread on Reddit turned saucy last Feb. 5 when a fan asked Mila Kunis on her kissing scene with Natalie Portman in 2010's "Black Swan." It turns out Portman is a common denominator between Kunis and hubby Kutcher, the one person they've shared a kiss with.

Kunis has been repeatedly asked about her heated scene with Natalie Portman in the movie, and in Feb. 5's Reddit thread was expectedly candid about the whole affair.

Kunis upped the ante by dropping a snippet of trivia, though. "She's a lovely kisser, very polite," Kunis said of Portman. "But here's a little-known fact: there's one person in the world that both Ashton [Kutcher] and I have kissed, and that's Natalie Portman."

The "Jupiter Ascending" star was referring to 2011's "No Strings Attached," where Kutcher and Portman co-starred. The Reddit thread followed through with plenty of questions, though, what with the limited window for interaction.

Kunis was asked about what Ashton smells like. "He smells like a man," she gushed.

"A real man! But he smells like a man. He does not wear cologne. But he makes sure he showers. Never offending. He has a very good natural smell about him, yeah."

Mila Kunis and Ashton Kutcher's kiss with Natalie Portman remained an afterthought to the couple's story, though. They're presently busy with their 4-month old baby Wyatt Isabelle, and they're reportedly very hands-on with the rearing.

"I am proud to be a stay-at-home mom," Kunis confessed.

"I have no desire to be in front of the camera. I find her to be the most challenging job I've had. The amount of love that you have, the type of love that you have, changes, the way you look at the world changes... everything has changed, because of her."

"I want an eco-friendly car, I want to compost everything, because I want the world to be better for her. And you have the opportunity to make a really great child for the world. Or a really great human being." (usmagazine.com)