During the season of Lent some people "fast" from something good for a time. Some Christians abstain from certain things all the time as a matter of principle. C.S. Lewis has some wise words on this topic:
One of the marks of a certain type of bad man is that he cannot give up a thing himself without wanting every one else to give it up. That is not the Christian way. An individual Christian may see fit to give up all sorts of things for special reasons - marriage, or meat, or beer, or the cinema; but the moment he starts saying the things are bad in themselves, or looking down his nose at other people who do use them, he has taken the wrong turning.