My weird cat

So…I’ve noticed that my cat likes to lick our venetian blinds. At first i thought it was just an attempt to wake me up to feed her in the morning, but I’ve noticed her licking the blinds in the living room, too. There doesn’t seem to be any reason for her to do this, at least by my reckoning…she is fed (excepting in the morning), she has water, she has her toys, what else does she need? More aluminum in her diet? The blinds make a weird sound when she licks them, kind of like a slinky sound, I guess. Does she like the sound or the way it feels? Does she like them because they’re cold?