We dressed up in skirts and wigs and raised our voices to see what kind of reaction we’d get. We walked in chatting and pointing at the chimps as if we were unexpected female visitors. They barely looked up. No erect penises, no confusion, except that they pulled at our skirts. A few minutes later one of the secretaries peeked around the corner, having seen two strange ladies walk by and thinking they were lost. With her, the chimps immediately showed the reaction we had been hoping for. We concluded that it is easier to fool people than chimps.
The chimps knew the men were't female :-)
