The sculpture has a very noticeable protuberance in Noir's trousers. This has made it one of the most popular memorials for women to visit in the famous cemetery. Myth says that placing a flower in the upturned top hat after kissing the statue on the lips and rubbing its genital area will enhance fertility, bring a blissful sex life, or, in some versions, a husband within the year. As a result of the legend, those particular components of the oxidized bronze statue are rather well-worn. Some visitors have seen women hike up their skirts and mount the statue as if engaging in intimate congress.
In 2005 a fence was erected around the statue of Noir, to deter people from touching the statue. Due to the protests of the female population of Paris however, it was torn down again.
http://en.wikipedia.org/wiki/Victor_Noir