Often, many Americans can associate with grams in terms of food fat, carbohydrates, protein and dietary fiber. However in home cooking, grams are replaced by teaspoons, ounces or pounds. Teaspoons in particular appear to have an emotional connection to home cookers, (old recipes, cookies, etc) as the teaspoon is still traditionally used in many English speaking nations such as Canada, USA, and England. Using grams in cooking old recipes doesn't mean throwing the recipe away. Rather, if one was to convert teaspoons/oz/lbs, to the exact equivelant in grams, he or she can have the opportunity to associate with metric units through recipes. The cooked food itself would not change. In a way, the recipe, even in metric units, is the same. This allows a person to associate with grams in a different way. Through volume.