gay relationships used to be a crime too. Whatever. If people just make up any law that suits their fancy, or insist that law changes with "enlightenment" well, you know... But while you are stuck on children, what about polygamy? Is not that a group of "consenting" adults? or animals? Who is to say if they consent? or are injured? whatever.
DCM is absolutely correct. Either a thing is wrong, or it is not. And you don't get to decide.