One thousand toilets

In one new 30,000 sq.ft. 4 storey public washroom building in Chongqing, China. Not sure I like or understand the symbolism of peeing into the stomach of the Virgin Mary, as she watches. What is she smiling at?

Link: http://edition.cnn.com/2007/WORLD/
asiapcf/07/06/largest.loo.ap/index.html