Men have the biological gear that's necessary to rape women do not. Men usually tend to be physically stronger than women, often when somebody commits rape they do so by physically overpowering their victim. But aside from that, even when you put biological differences aside the fact remains that men are naturally more aggressive and more sex driven and thus are much more likely to do such stuff.
Rape is an interesting concept in terms of practical terms; detached scientist. Modern woman are sexually liberated and might allow all forms of sex with certain people, without any complaint. She may even initiate the sex. But if another person, not invited to have sex, does the exact same things, it is called rape. There is no clear cut distinction, in terms of the physical mechanics, such as there would be if we dealt with virgins and rape, sex or no sex.
In that respect, modern rape is similar to stealing. As an analogy, I own my car and I allow my friends and my family to drive it. I am good with that. But if a stranger took my car, then it is stealing, even if he is a good driver, and does no permanent damage. The car does not see any difference in wear and tear. On the other hand, If nobody can drive my car, and someone did, there is a bigger distinction. Either way, I may be emotionally scarred by the thought of someone stealing from me. The real damage is to my ego, but it is not to the car.
Say you are stopped at a stop light, and someone tried to carjack you. If you allow it to happen and get out of the car, the car will be gone, and you may be OK. If you resist the thief, he may strike you with a weapon to subdue you. This changes stealing into an assault. The assault may or may not have occurred if one did not fight back. If the thief wants the car, he will wait to see how much force is needed to get the car.
The original occupation, in ancient times, was prostitution. Sex was considered a thing of value and could be traded as a commodity. Does the concept of rape increase the value of this commodity? Civil suits connected to rape, are often filed for monetary compensation.
Here is an another interesting parallel. Instead of sex, let us look at food. We all like to eat. Say you are at a dinner party, where the hostess loves to cook, and loves to feed her guests her delicious food. You eat dinner and enjoy the food. The hostess, then insists that you have another helping, but you say no, because you are full. If she continues to insist, and you finally give in; peer pressure, is this dinner date food assault? Is no supposed to mean no, or is no just part of the food date barter game?
Again, one is being asked to do something, they do anyway, but they are being asked to do this, during an occasion where they have decided not to do it. However they feel social pressure, to say yes. Is this dinner date rape or food assault or both? Should people deal with this, in the stride of friendship and move on? Or should we allow this to devastate us?
Should we dwell on it, to where they have an eating disorder and become very defensive and/or angry against all polite hostesses? It all depends on social programing. The hostess may honestly think she is being good to you. She knows that the her food will go into your mouth, to your stomach, then through the intestines to be processed, and then finally discharged, with not permanent body harm. Food does not go the brain in any direct way,m unless we are taught the value of our stomach commodity.