Should you give into cravings?

I woke up two days ago and was craving a donut. The craving wasn't intense; just more of a "that would be pretty good, huh?" question in my head that was banging around for a bit. I didn't really care about a donut, so I didn't have one. The same thing happened to me yesterday. Same voice, same situation. Unlike two days ago, I decided to give into the voice. Why? For me, multi-day cravings will...