All young people know this because they experience these passions on a daily basis. Now if you cannot avoid these fatty foods completely, then set a discipline for yourself to eat only once a day, as many spiritual persons, hierarchs, and even worldly leaders do. In this manner the body is kept lighter and healthier and the mind is clearer and more capable of advancing upon divine thoughts. Even then, it is important not to overeat. Temperance is when someone wants to eat some more food but abstains, rising from the table still somewhat hungry.
Sufficiency is when someone eats what is needed and sufficient for normal nourishment.
Satiety is when someone eats more than enough and is more than satisfied. Remember also that rich man who ate in this present life sumptuously every day, but who was deprived of the desired bosom of Abraham in the next life, simply because of this sumptuous eating. Remember how he longed to refresh his tongue with a drop of water. It is this temperance that serves as a control to those youthful passions and desires. Job, too, assuming that one could fall into sin through eating, offered sacrifice to God for his sons who were feasting among themselves.