For some reason they both like to sit ass on one stair, feet on another stair. The only other dog I’ve ever seen do this was my first dog as an “adult”, Mr Dog.
Cassie will occasionally do that, though I'm not sure that I've ever caught a picture of when she does it indoors. Mr. Dog is a fun name. It reminds me of the main dog I grew up around, Dee-O-Gee.
There’s a candy bar in Canada called Mr Big whose slogan was “when you’re this big, they call you Mister”. He thought he was huge, but he was actually the size of Biscuits (the black dog in the photo).