harrigran that reminds me of the time I was accompanying a child in my class at a school medical (those were the days). The doctor asked the 4yr old if he had 'passed water' that morning!! 
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. Better than euphemistic skirting around of ordinary everyday shit.

I was assuming that the flavour was related to the smell. Things usually taste like they smell. eg I don't eat corn on the cob because I don't like the smell.
I never saw such behaviour when I worked with children nor did my DC or GC ever do it. I tend to think that people who ingest unusual substances do so because they are lacking in certain elements of their diet.