Lena Dunham posted a nude selfie on Instagram this week, but according to one very adept mansplainer, she was doing it all wrong.

In the nude selfie, which was posted on Instagram, Dunham is topless and covering her breasts with her arm. But, one guy decided to chime in with his thoughts on her pose, informing Dunham that she wasn't cupping her boobs correctly.

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The Insta user told Dunham that the apparent correct technique for nude selfies is actually to "hold the boobs up over the arm" in an effort to enhance the cleavage. Um, what?

The mansplaining didn't go unnoticed by others.

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In fact, Dunham herself expressed gratitude for the guy's highly educational comments.

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Phew, thank goodness this guy was around to educate women on how to pose!

（作者：汽车电瓶）