I haven't had much luck with humans allowing me to study their body language, so after reading the book "Do Cats Think" I decided to analyze the three cats who dominate my home.
Frizbee, posing amoungst the books, seems to say, "Of course we think. Do you?"
Haughty Beowulf's posture says, "Why should I communicate with mere humans."
Grendel and Beowulf share a secret, "We exist to eat and sleep. Sometimes we allow humans to stroke our fur to vent their frustrations. and reduce stress."