I can drink three coffee cups at midnight and sleep well. It doesn't even make me feel more awake in the morning. Nothing. Apparently I'm immune. I drink coffe

I can drink three coffee cups at midnight and sleep well. It doesn't even make me feel more awake in the morning. Nothing. Apparently I'm immune. I drink coffee especially in the form of cappuccino (the Italian one, in case the name is shared by many different drinks) and I could quit at any time, but I like it so I won't.