Anyone who thinks of himself as a pretty good person ought to take a look at God’s assessment of humanity. He says we all come into the world spiritually dead and are ruled by Satan, his world system, and our own sin nature, or flesh.
Satan works very hard at corrupting healthy desires. He abhors seeing people's appetites satisfied. What he wants is to watch a person lusting after a good thing until he or she is controlled by the impulse to have it.