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According to Jennifer Garner, her husband Ben Affleck takes a lot of pride in raising their 2-year-old boy — especially when it comes to teaching him about his private parts.

The "Draft Day" actress appeared on Wednesday night's episode of "The Tonight Show With Jimmy Fallon," where she revealed the different ways she and Affleck approach parenting, as well as the odd fascination their son Samuel inherited from his dad.

Garner started off by explaining how she and Affleck have very different roles as a mother and father when it comes to raising their three kids: "If it has to do with making food, or homework, or anything that has to do with actually functioning — sorry it's true — that's a mom thing," Garner told the audience. "And then, coming in just as you're getting them to bed and picking them up by their heels and swinging them around, that's a dad thing. Anything fun, that is Ben."

But the fun doesn't stop at fun before-bed antics, Garner clarified. Now that Affleck has a son to bond with (in addition to daughters Violet and Seraphoina, ages 8 and 5, respectively), he's imparting all kinds of wisdom on the young boy.

"He's so psyched to finally have a boy," she told Fallon. "You know, he loves it. I mean, he loves his girls, but he's serious about his son right now … So he taught him about his 'bits.' He taught him about his 'P' and his two 'N's.'"

And, while that's certainly good information for a child to know, Garner seemed less than thrilled about Sam's new fascinations. "Now, every time we pass a dog who's walking on the street, or we're at a zoo or something, our poor little son is crouching down, looking up, and he's like, 'Mama? Does that have a vagina or a penis and two nuts?'

"That's what Ben's been up to," she added.

Check out the hilarious video below to see how Garner sometimes corrects their curious son.

Actress Jennifer Garner ~ Jimmy Fallon's... by HumanSlinky