My cat puts her paws behind her head when she lays back like she is lounging...

[New Cat Like-er]

...or something. What does it mean? She mostly does it when she is playing with me dogs or laying in my arms.I think it is a good sign. Sometimes she scratches at her chin while holding her head this way, but not more than one or two swipes so I don't think its an itch... Imagine a cat lounging on a hammock with her paws behind her head...
Also, she has done the rolling on her back/side to show me her belly, but this is new lol.

 

[clovicat]

It means that she is comfortable with you. Cats do not typically lay with their abdomens exposed unless they are pretty comfortable in their surroundings. It is a very vulnerable position.