Debate Gay Marriage, in Their Fashion (http://graphics8.nytimes.com/images/2013/02/03/fashion/03MARRIAGEispAN/o3mABBIAGElSPAN-articleLarge- v2.jpg] Gonzalo Fuentes/Reuters Jack Lang, center, a former French culture minister, and Pierre Berge, second from left, the longtime personal and business partner of Yves