Lyric discussion by deftly 

Cover art for Move On lyrics by An Emotional Fish

I think this song is a warning to anyone who encounters anything that could lead to destruction in their lives - drugs, alcohol, a person, even an innocent experience, saying that "once is enough" and to move on, move along, keep moving. Even if it feels like you need it or things will never be quite the same without it, move on, or you will eventually trap yourself into becoming addicted.