You are absolutely correct in saying that boasting about sexual assault shouldn't be labeled "locker room talk."  It's sexual assault. This won't change. It's how people have been taught to think for a very long time, and strangely, I believe it comes from our psychotically religious heritage where all anyone talked about for a thousand years was religion and what God wants, what God thinks, what God sees, our Manifest Destiny, etc. We evaluate everything as if we are God and can offer some omniscient judgment on what everything "is."  It's just this, and it's just that, we say, deciding the cosmic meaning and value of all things.   

Framing things this way perpetuates the violence.  Few people deal with what is as it is. Instead, we address the labels we give to reality, just as so many have here with the dishonest "locker room talk."  It forms our entire way of communicating, and it allows for a lot of manipulation and violence that cannot be extricated from our view of reality.