i think that what purring actually is, is laughter for cats.  see, because cats don't really HAVE a way to laugh, and you know they must find stuff funny.  so my conclusion is that when you pet a cat and he/she gets that big ole smile on his/her face and purrs, that's really because you're TICKLING the cute little beast.  and you know how sometimes a cat will just start purring in the middle of his/her sleep?  i think cats do that because they're remembering a joke they heard.
submitted by. caspian jenkins
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