The definition of hunger varies. I don’t believe anyone really understands what true hunger is till they completed a longer fast.
Saying your body told you to eat the second day is just as laughable as a fat person on a diet saying a dozen donuts is necessary.
Honestly I am not making fun of you. It be easy to be confused when you are starting out.
This paragraph explains regarding appetite : The first day of fasting is seldom accompanied with any noticeable change in the usual demand for food. On the second day there is usually a big demand for food. By the third day this has greatly abated or entirely disappeared. From the disappearance of appetite onward, for many days, the body ceases to call for food, until a time arrives when food must be had. During this period it is not uncommon for a repugnance to food to be present. Nausea and efforts at vomiting may develop at the very thought, smell or sight of food. But a time comes when natural hunger returns, when it is very necessary to avoid over-eating.