Perhaps there was no communication at all. It is possible that a man cannot see the severe emotional trauma that is happening inside a woman. Women don't either. Obviously this is a good warning for women in dorms, but I just don't see rape being such a clear cut issue anymore. Because a majority of rapes aren't violent strangers,the stats suggest this.
Clear intentions are perhaps a better warning.
Don't wait until the heat of the moment to decide when to say when. It might not be such a good limit later on when the enormity of the occurence comes crashing in on you. That is not just a statement to either sex, both are responsible for the prevention.