Obviously I don't, as you know I don't, and if you're really interested in having a proper argument then you'll refrain from responding with smart-assed questions and instead point out what exactly you think are the logical flaws in my argument and lay out counter-arguments.
A "want" doesn't have any greater ontological status than does "democracy" or "good manners." Wanting is an instrumental and purely abstract notion that we use to describe and predict action--including our own action. That's all. Action, in turn, is produced by the firings of nerve cells (working through muscles and the like), which operate according to a certain biological and chemical principles, and so on. In this way, physical laws ultimately drive the action tendencies that we would look upon and refer to as "wanting;" however, a neuron does not properly have "wants" any more than an H2O molecule has "wetness" or a wrench has "usefulness."
Natural laws describe the workings of the natural universe. That is the definition of a natural law. So that means...
(Pay attention: this is what a proper argument looks like.)
If something is part of the natural universe, it is described by natural laws. (From the definition above.)
If something is not described by natural laws, it is not part of the natural universe. (Modus tollens)
If something is not part of the natural universe, it is--by definition--supernatural.
"Supernatural" is a synonym for "magical" (From the dictionary definition of "magic.")
Therefore, if human action "opposes natural law," human action is magic.
That's not even close to what I'm saying. What I'm saying is that explaining why someone chooses chocolate ice cream by saying that "they have a preference for chocolate ice cream" is not an explanation at all. The allusion that I made was to illustrate that this is just as ridiculous an attempt to explain something as saying that opium makes one sleepy because it has sleepiness-inducing properties. Just like the doctor's explanation, your "explanation" merely restates the explanandum in different words.