Well, the author seems to be saying that it is possible that "body language" counts when it comes to passion. People have evolved beyond that. Body language, for all intents and purposes, no longer exists in civilized society. The idea that a man or a woman could communicate "want" to a prospective partner through movements or facial gestures is so far removed from today's reality that the suggestion is simply insane.

We are a nation with laws and language. Common Law is sufficiently advanced that a man or woman need only say "I was raped" or "I was assaulted sexually" for a charge to be laid, and incarceration to ensue. This is the true hallmark of how civilization has advanced. This has been made possible by the realization that any sex act is, in and of itself, an act of violence, as is any physical contact.

Rapists will continue to whine that they are innocent, but we now know that no person would ever have cause or motive to lie about such a serious offence.