Lyric discussion by runblue 

this song makes me all kinds of fuzzy happy on the insides =]

im pretty sure that "sweet tooth" has a different metaphorical meaning in each stanza.

for instance, the first is probably drugs, the second is life/depression/pessimism, third meaning of life, fourth is being ugly, first love, sex, and on throughout.

its definitely about an addiction to sugar, but could allude to a multitude of things. either way, the gratification from the addiction is greater than a sober life for the author of the song.

its such a lovely melody, thanks for the lyrics! anyways :)

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