Visitors watch models wearing sexy underwear strut down the catwalk during the fourth Guangzhou Sex Culture Expo in Guangzhou, South 皇冠体育app's Guangdong Province, November 4, 2006. The expo is designed to promote general sex awareness, knowledge, and academic discussion and co-operation in sex studies. [Li Xiaomeng/New Express]

Visitors scramble for free condoms during the fourth Guangzhou Sex Culture Expo in Guangzhou, South 皇冠体育app's Guangdong Province, November 4, 2006. The expo is designed to promote general sex awareness, knowledge, and academic discussion and co-operation in sex studies. [Li Xiaomeng/New Express]