Fat does not automatically turn to fat in the body - that is kind of like thinking that if you eat broccoli, you will turn green.
The principles behind low-carb diets are that fat and protein satiate hunger much better, and for much longer, than do carbohydrates, and are metabolized into glucose much more slowly. So, even though a gram of fat contains 9 calories and a gram of carbohydrate contains 4, you will generally need far more grams of carbohydrates to feel satisfied than you would if you were eating only fat (and who the heck sits down and eats a block of butter, anyway?). It is much harder for the body to metabolize protein and fat to glucose (and thus, eventually, store the calories as fat) than it is to metabolize carbohydrates into glucose, which happens almost immediately.
The glucose causes insulin to be released, and in most obese people, that means too much insulin (due to insulin resistance) and the insulin is what causes the extra calories (extra as in beyond the calories you burn during the day, even simply to breathe) to be stored as fat. It must be said, of course, that no matter what you are eating, if you are eating more calories than you need, you will gain weight. A high protein, high-fat diet promotes reduction in calorie intake in part because it staves off hunger (rather than stimulating hunger, as carbohydrates do), but, yeah, if you gorge beyond hunger (i.e., the pound of bacon your doctor mentioned).
I would try to stay away from processed meats like bacon and deli meats (almost always made with sugar, by the way) if you can, and stick with whole, natural sources of fat and protein like regular meat, cheese and eggs, and try to limit fluid milk, which is high in lactose (milk sugar) - and the lower the fat content, the higher the lactose, by the way.
I don't think you should worry too much, because your doctor knows what he/she is doing. If you follow the advice you were given, you should be fine.
My Dr wants me to follow a 2-week liquid diet. I mean am I really that fat! Come On you gotta be kidding me!!!! I have heard some same their Dr says 3-4 days or less. Then what the HELL is My DR doing!?!?! Anyhow. I am really struggling. Any suggestion are welcomed, because I am a MEAT person, No reality check! I AM A FOOD PERSON! I love food, but can no longer continue to be OVERWIEGHT, BUT I don't know if I can manage being on a liquid diet knowing hopw much I am addicted to meat, andstuff. I need help!! If anyone out there can relate to what I am going through please HELP! I am only on Day 2 and feel like I am not going to be able to make it for another 8 days! HELP!!!