Well, from a women's perspective certainly in terms of mainstream shopping environments I would generalize that shoppers want to know that what they are buying conforms to the status quo. So, in the right environment a Like button could do very well to increase sales of certain items. Those who are comfortable buying on their own taste level will likely be turned off by a Like button or would be shopping in another kind of area, such as second hand or locally made. There are also things such as bras and underwear that are Liked because of how comfortable or effective they are: women definitely like to share this information.