In this song, a man takes his wife/girlfriend for granted until she can't take it anymore and walks out. Now he's unable to cope with her rejection. Huey Lewis & the News had a hit the previous year with another song comparing a woman to an addiction: "I Want A New Drug." (thanks, Mike - Santa Barbara, CA)
Steve Kipner and Jon Parker wrote this song. Kipner also wrote "Physical" and "Genie in a Bottle." Parker has written many songs as well as music for TV shows, including the game show Family Feud.
This song makes great use of two very different voices in the band: Peter Cetera sings most of the verses, while Bill Champlin comes in for the chorus ("I'm addicted to you baby!").