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Today was a monumental day in the history of animals doing the nasty. For the first time ever, a photo has been taken of two gorillas engaging in "face-to-face" (not-so-fancy anthropologist-speak for missionary position) intercourse. Though this behavior is common in gorillas in captivity, it's very rare amongst those in the wild. So adorable, right? Except for the fact that, uh, that's the female gorilla's daughter off to the side, watching them do it. ("Moooooom! Ewwwwww!") Click on the photo for additional photos of tender, sweet gorilla love. [National Geographic]

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