Yep, it exists and the Chiang Mai Zoo tried to deploy it to get Chuang Chuang aroused for his female partner. Nothing doing. Chuang Chuang apparently has other preferences for his wing-wang. Farkers comment with their customary charm here.
This article available online at:
http://www.theatlantic.com/daily-dish/archive/2007/04/panda-porn/229630/
