Many people just cannot do without coffee. They need it right after they wake up, they need it when they are sad or happy, and they need it without and without reasons. The very aroma of coffee gives them a sensation that nothing else can.
What Happens When You Drink Coffee on an Empty Stomach
Though there is no problem in having coffee in limited amounts it definitely should not be the very first thing you consume every morning because then You may then suffer from diarrhoea.