Yes, it's true that she knows what she's doing when she squeezes your arm or -- at the other end of the spectrum -- rolls her eyes and turns away. Those are direct forms of body language. But romance can be like a game of poker -- you might catch signals she doesn't even realize she's giving off. For that, we look to the shoes.
Renowned British psychologist Geoff Beattie says people try to mask their facial expressions but don't realize what they convey with foot movement [source: Wardrop]. If, while she's talking to you, a foot moves away from her lovely form to project a more open posture, that's good. You say her feet never stop moving and she laughs a lot? That's truly a winning combination [source: Wardrop]. Crossed feet, however, are an indication she's not into you.