Just for the heck of it, and for the sake of scholarly integrity,I went without coffee for ten days. I am pleased to report there was absolutely no effect on my behavior whatsoever, nor did I commit suicide. At least I think I didn't. I may be a ghost, however. Anyway, I consider the issue settled and I went back to my hedonistic tendencies, and am currently enjoying a cup of coffee as black as my soul.
Come to think of it, I've also gone long periods without chocolate, sleep and sex without thinking it's the end of the world. I just prefer not to do without pleasurable experiences if they're available. There's a lot of joy in life; I see no reason not to partake thereof. My cat seems to agree with me.
Author of Redneck Buddhism: or Will You Reincarnate as Your Own Cousin?