While I understand the need to attack the problem of sexual assault, I don't think that statements such as "Men sexually assault women because they can" are particularly helpful.  It suggests that all men sexually assault women.  I am a man and I have never sexually assaulted a woman.  It would be much more helpful to state that some men sexually assault woman.  Has a study been conducted to understand why some men sexually assault women, while others don't?  

Please note that I am not discounting the problem.  I just think that more analysis is required in order to understand the source of the problem.  Is it really just men, or is it some men for reasons that have yet to be uncovered?