Just as a point of order: male rape does happen (from one article "Survivors UK estimates that across the UK between 2010 and 2014, 679,051 sexual assaults and rapes of males took place. Of these 652,568 were not reported to any police force."

Quite how they were able to get these figures is hard to say but around 7,500 seem to have been reported to the police. Under-reporting is thought to be more severe than for rape of women.

It doesn't invalidate your main point, Jim, but I think you would not have just that that 'invariably it is a woman' in if you had paused a little longer.