Every day is the first for something

Well, I definitely have come to realize that I like food.  Like all Americans I have been made to look at junk food as good food.  Re-programing ones mind is going to be the difficult task.  How does a "slim" person see food.  I have a friend who lives in Las Vegas and every time we get together we always end up going out to eat.  While eating he thinks about how much he is going to have to run later to work off all of this food.  Afterwards, if he ate too much he complains about how his stomach hurts and he wishes he could just throw-up to release the pressure.  Now, I am totally not condoning any form of eating disorder because I know they are a severe psychological problem that needs to be dealt with but is that how I am suppose to look at food?  How am I suppose to train myself to see food as only fuel and not something enjoyable?  I do not exercise above and beyond my daily activities that quite often are strenuous but realize that it is an important part of weight-loss.  How does one look at a bag of chips and say to themselves, "oh, I will have to exercise an extra hour if I eat those!?"  My mind is just not programmed to do that.  Now my mission is to clear out the junk foods in my apartment and research how to retrain ones mind to look at food in only a body sustaining substance.