Ben Affleck, Jennifer Garner Marriage: Reese Witherspoon Congratulates Actress On Husband's Private Parts [VIDEO]

According to Oscar winner Reese Witherspoon, Jennifer Garner is one lucky gal.

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Earlier this week, the Wild actress was on Watch What Happens Live with host Andy Cohen and Hot Pursuit co-star Sofia Vergara. The episode got interesting when Cohen threw some questions at Witherspoon and she could only plead the fifth to one of them.

The first question asked was what the actress thought about Ben Affleck's private part- or as Cohen likes to call it... "peen"- since Witherspoon was a producer for the movie Gone Girl when Affleck did a brief frontal nude scene.

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The first thing Witherspoon did was laugh hysterically. Then when she caught herself, she said, "I mean, that scene went so fast! I didn't see it!"

Vergara then jokingly asked the actress, "Are you complaining then?"

"No!" Witherspoon responded. "It was great. It's amazing. Congratulations, Jen Garner."

Affleck and Garner have been married for almost a decade. The Gone Girl star's wife is currently a part of Neutrogena's Choose Skin Health Campaign to help prevent skin cancer. In an interview with People, she discussed how important it is to take care of skin.

"Everybody's touched by cancer," Garner said. "Luckily for me, it hasn't hit my immediate family yet, but if you look at the statistics, it's something that is going to touch all of us. It's within our reach to find a cure, it's within our reach to find better and more efficient treatments that do less to hurt the body. It's all happening, but we have to make sure these brilliant doctors are supported and funded."

See Witherspoon's question game challenge below.