Well.. they can and do commit rape with the normal use of their 'equipment'. All of those biological bits will operate without the consent of the conscious mind on both men and women. It's the exact reasoning given that makes it hard on the victims - if the same argument was made regarding female victims and lubrication, it would be rightful torch and pitchfork time from most anyone with any feminist tendencies at all, yet people just -assume- that the reverse function isn't true.