As discussed over and over again here in this forum, water is oft equated with emotions, as I am sure you know

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Perhaps your husband is overwhelmed with the fact that he doesn't want to quit just yet, but that he still wants quit or at least abate his dependency (ie a cigarette being smaller than a cigar) As for the husky, dilapidated singer perhaps his quitting is because he doesn't want to end up in the same sitch.