A rather implausible report in Chinasmack (translated from the Chinese journal 163) says that a zookeeper saved a rare, born-in-captivity baby Francois Leaf Monkey from surgery by licking its anus until it passed the whole peanut it ate after a thoughtless patron tossed it to him. Reportedly, the anus-licking proceeded for over an hour.
50-year-old Zhang Bangsheng used warm water to clean a small Francois' Leaf Monkey's buttocks, then began using his mouth to lick it, not stopping for over an hour, until the little monkey defecated a single peanut. Only after the peanut was defecated did Zhang Bangsheng laugh with satisfaction.
As it is understood, this small Francois' langur is only 3 months old, and is the first Francois' Leaf Monkey to be born in nearly 10 years at this animal park. The Francois' langur is a rare primate from Guangxi and Guizhou and is amongst the nation's most protected animals. Because it is so precious, the zoo gave it to model worker and high-level expert Zhang Bangsheng to care for and raise.
The accompanying photo is rather ambiguous.
Zoo Caretaker Licks Monkey's Butt To Help It Defecate