Out of all things Trump has said this is the most benign thing. Two guys having a chat how they would like to bang some chick. Also Donald being Donald brags a little. NO BIG DEAL! But I have no doubt that this will sink Trump the most. Not muslims comments, not "mexican thing", this will probably sink him because media will have a field day. And that tells you something about usa elections.
If you think that talking about how you want to sexually assault women against their will is normal, you're a waste of oxygen.