i wanted to start using poly, but my girlfriend pulled up an article that says they're slightly less effective. while i'm positive that this is the reason we don't use poly, i can't link you to the article and i think it was pretty dated anyway (1997?) so i would recommend some supplemental research (for you and, come to think of it, me too) if you want to move beyond the realm of tongue and hands but not quite into the realm of baby.
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and that's the end of that chapter...
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