The Code of the Rottweiler, Rule Two
Rule one, if you recall is: Pain is as nothing.
Today's rule (number two of the Rottweiler Code):
Bad things never happen.
This is why Rottweilers make good guard dogs ("Someone hit me on the head with a stick? When?"). It's also why they don't totally get 'no' and why they're not very trainable with negative methods.
I actually kind of like this philosophy and wish I were better at applying it myself, though you have to admit it must give them kind of skewed world-view....