Unless there is physical evidence of an attack or abuse I would think that the Police and prosecution services would have a horribly difficult job in proving/disproving that a crime has been committed.
Given your choice of degree you will have an interest in human nature ~ and will be, or become, aware of the stuff that makes us tick.
There have been false allegations of rape on an ongoing basis in the press/courts, the reasons that people do this are beyond my understanding.
In the current celebrities investigation there will be people who are trying to remember incidents that happened many years ago ~ their story will never be fully accurate.
There may also be people taking advantage of the situation due to attention seeking.
And, being female, I am also aware of how a teenage girl may/could take advantage of a celebrity ~ where no crime has occurred but, for whatever reason, has decided to get involved in this investigation by reporting the incident.
Unfortunately, there will be some very genuine cases and, hopefully, the Police are able to investigate and prosecute the guilty parties (if they are still alive).
I find cat psychology much simpler to understand ~ if I do something to one of my cats that they do not like they bite me. Simple!
:-)
I hope that some of the above makes some sense ~ my brain seems to be on strike today