I think this song is about addictions. Smoking, drinking, pornography, and s**. They think of excuses to justify their addictions, and won't admit their problem. But in the chorus they have a moment of clarity, and realize they need help. "I look, I don't touch/It's really no big deal" is a common justification for looking at pornography.
The "someone" that they need the save them from themselves is God.