How are men and woman serial killers motives different?

For men, there is usually a sexual element to their murders. At some point in their development they begin to associate sex and violence. When women kill it is usually for reasons such as financial gain. Serial killer Aileen Wuornos is a good example. Her crimes were thought to be sexual in nature, commonly seen in male killers. But Wuornos was the rule and not the exception. She killed her male victims for the simple fact that they possessed what she wanted. Money and a car. Killing them was the easiest way to get them. For Wuornos, sex or even control had very little to do with her crimes.