This article indicates that the genetics is the reason for women loving shopping or window shopping more than men. Women take longer time to buy a simple item, while men will buy 10 different things within that much time. They don't like to waste time on shopping much, while women enjoy shopping. According to the researchers, genes has naturally made women to llove to shop while men to hate it.
Read this article - http://abcnews.go.com/Technology/DyeHard/women-love-shop-men-dont-blame-evolution/story?id=9281875