From the same reason that man like cars they are thought to like certain gender compatible objects since they are young.
Women who are marked by sociaty as fashion lovers do tend to find more intrest in shoes more them man.
there is no biological predisposition by woman to like feet ornament, view this article it is very enlightening.
http://www.usatoday.com/tech/news/2006-07-31-women-tech_x.htm
