I took a look at Chapter 6 (about thumbs) and noticed something that I get a very different signal from. There's a picture of a woman with her hands in her pockets with the thumbs exposed. The writer suggests this is a sign of authority, but to me it feels either like a flirty signal or a sign of readiness or expectancy (which obviously can go hand in hand). It kind of gives me the same vibe as the 'face platter', but in this case the woman is showing off her figure instead of her face.