What does the song Constant Craving mean?

Who wrote the song Constant Craving?

“Constant Craving” peaked at number eight on Canada’s RPM Top Singles chart and number 38 on the US Billboard Hot 100, giving lang her only US top-40 hit to date.

Constant Craving.

“Constant Craving”
Released 27 April 1992 (UK)
Length 4:38
Label Sire Warner Bros.
Songwriter(s) k.d. lang Ben Mink