You've kissed butt at work, but this zoo keeper took the metaphorical act to a whole new (and literal) level.

Chinese zookeeper Zhang Bangsheng, 50, reportedly did the unthinkable when a leaf monkey in his care couldn't pass a peanut: he licked its butt for "over an hour" to encourage it to defecate, China Smack reported, citing the Wuhan Evening.

Bangsheng claims the monkey was too small for medication to help it pass the peanut, so licking was the only way to help it -- after washing its bottom with warm water, Orange News reported.

Some news outlets are questioning the authenticity of the story -- and why Bangsheng used his mouth rather than the more traditional method: a warm cloth.

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According to the video by China's HLJ News, the monkey was the first of its kind to be born in the country in 10 years.

