ah ... I get a different slant on what you are saying
I completely agree on the matter of food. One way or another we can lose touch with what our body tells us about what we should put in our mouths but if you get back to a helathy diet after eating a fair amount of junk, it suddenly all makes sense.
Interestingly, in Australia, we are in the midst of a junk food debate. A recent study has shown that, contrary to popular belief, our children are not exercising less and hence, the weight problems are directly a product of poor diet. It's been very obvious here that many junk food companies have backed healthy exercise programs giving them an image of social responsibility whereas what they are really doing is taking the heat off themselves by trying to make exercise the issue. There is considerable pressure here to remove junk food adds from TV particularly when kids are viewing. [Of course the adds are aimed at kids persuading their parents to buy junk for them and this is also pretty devoius].
As far as your general point about dopamine goes I sort of agree but the issue is similar to the food example in that first we change our behaviour to something that works better and from that the dopamine [if you choose to look at it this way] follows.
I most certainly do not believe that experience alone is all we need. What concerns me about behaviour in your country and mine post 9/11 is that we have become more inward looking in so many ways. Instead of getting out and rubbing shoulders with people who have different views to our own we are living in monocultural communities, making our McMansions into castles with our entertainment provided at home thanks to our Home Theatre. One thing should be evident from what we know from past experience about dealing with threat. If you hide away, the problem becomes worse. If you face it, it becomes manageable.
edit: hmmm ... I fear this has absolutely nothing to do with gratification or music. Maybe others will get the ship back on track.
jules