If we were the "superior" species, it looks like if we wanted to quit doing something we just would. Quit smoking no problem, quit over eating no problem. Learn to speak French, done. If the part of our brains that wanted to stop or start a behavior was all that was in charge it would be simpler. The remainder of our brains and thoughts are the parts that drag us miserably down to the level of animal. Desires and feeling fixes fuck us up always. There isn't a person on the planet that can turn things on and off permanently at will so I am just not going to beat myself up that I am terribly terribly human. I'm also talking to the folks that think behaviors that can simply be "PRAYED AWAY". Just doesn't happen.