My cat Minnie licking a window screen

My cat Minnie is a little bit special, I guess you could say. Here she is in my duplex licking the window screen. This goes on for quite a while sometimes. I wonder if this feels good on her tongue, or if she just likes the scraaaaaaping sound.

[@celloelf]

My cat does the same thing, but she's deaf, so maybe it's the feel!

[@sherricannon9407]

My cat does this all over the house! Did you happen to find out why??