Pardon me while I explode.
To relate this to food, it is very important to take social aspects into consideration when pondering health issues. You cook (if you do cook) what your family made. You learn your eating habits from them. Then you go out with friends and choose food that will please your conditioned palate. Your friend orders a drink, so you order a drink. Your friend lights up a cigarette, so you light one up or take a drag or simply stand outside and suck up the secondhand smoke. But this isn't a tirade against smokers. Diets, for example, work much better when you're not the only one on them. (Misery loves company.) The same holds for exercise routines.
It is much easier to be motivated when you're not alone. We are such social creatures.