I Am Fascinated By Human Behavior

Do you prefer working with men or women or both? I've never had the huge problem working with or for women that most people, especially women, seem to have. I've worked with and for both women and men and have had equally good and bad experiences with both. One thing I don't understand is why women are not more supportive of each other in the workforce. I can understand why men would be sexist toward women and support men more but don't understand at all why women would be so biased.