Feet movement

There are different kind of feet movements but people don't notice these things . But these feet movement are the only thing that's hasn't changed in human being because it doesn't say any lie. 

If you approach a guy or girl see for their directions of their feet . Is it pointing toward you or the other direction? Which means are they willing to add you on the conversation  or they don't you there.

Look for feet direction . If someone is coming on your way and you talk with them if their one feet points to a direction and one point towards you  that means , They want to receive you but they have a job to do also.

You can also ask them question about this behaviour very kindly so they'll feel less awkward to say what's happening to them .