Yes, may I just quickly respond?
Regarding the concept of a presumption, I believe a similar concept was debated some years ago that would potentially allow for the examining of the nature of the relationship and thus call the nature into examination, potentially bringing the victim in, and opening up this large, very significant problem.
Here's the problem: everybody will do it. The victims will not want to get involved. Law enforcement will be very frustrated, knowing that some long-going battle fought out between lawyers is eventually going to frustrate everybody. So law enforcement will choose to spend its time, under most circumstances, following different routes, perhaps laying different charges. It will simply bog down the courts.
In my opinion, it will basically be an ineffective law and will not be enforced.