I would not say there is a pleasure chemical, more that it is a contentment chemical. It is more of a signal that the situation is so good that there is no poin

I would not say there is a pleasure chemical, more that it is a contentment chemical. It is more of a signal that the situation is so good that there is no point in trying to improve it. In a sense they are antagonists. The compulsion is driving you to do something, perhaps anything, and will eventually drive you into the ground from stress. The other will drive you to do nothing, even if it means that you waste away from lack of water and nutrients.