"Bernard Boursicot (born 1944) is a French diplomat who was caught in a honeypot trap (seducing him to participate in Chinese espionage), by Shi Pei Pu, a male Peking opera singer, whom Boursicot believed to be female." (http://en.wikipedia.org/wiki/Bernard_Boursicot)
Here is a picture of the two: http://www.mayacafe.com/forum/user_images/1246662181_1_.jpg
Here is a picture of Shi Pei Pu as a woman: http://i.telegraph.co.uk/multimedia/archive/01436/shi_pei_pu_1436204f.jpg
Also, M Butterfly is a play based on this outrageous event (http://en.wikipedia.org/wiki/M._Butterfly) and that is how I found out about it.