Two women sacked from their jobs caring for a gorilla in the US have sued their ex-employer for allegedly ordering them to show the animal their breasts.
Nancy Alperin and Kendra Keller claim they were told to show their nipples to the gorilla, Koko, as a way of bonding.
Sign language requests from Koko, the "talking" gorilla, were allegedly relayed to the women by the Gorilla Foundation's head, Francine Patterson.
Update: Koko is a female gorilla.
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