It's a common idea actually that both cats and small children can see not just ghosts, but also other spirits, elementals and the like. They are also the only ones that can walk across witches' ceremonial circles without "breaking the seals".

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Kitty's Lingerie
Kitty's 1000th
Surprise Threesome
Lazy Evening
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Once you can accept the universe as Matter expanding into Nothing, that is Something. After that, wearing stripes with plaid is easy. --unknown