If your plumbing is clogged, it can be a sign that your emotions are blocked. If a toilet overflows, it can be a sign that your emotions are overflowing. Frozen pipes can symbolize that your emotions are frozen. A leaky tap can represent a constant drain on your emotions. Of course, a leaking tap could simply mean that you need a new washer, but often there is a correlation between plumbing and one's emotional state.

Denise Linn, The Secret Language of Signs