Glad this was tried.

I have often noted the temperature difference between my right leg compared to my left.

When someone touches it below my ideal level, it is usually an awkward sensation. Even when my wife taps me ontop of my left knee while driving in the car having our usual conversations, I kinda flinch and it suddenly makes my anxiety go up in a heartbeat. A tap on the thigh closer to my hip, nothing notable other than grabbing my attention to pay attention to her. 

Doctors doing the neural tapping test with the rubber hammer has to be repeated at least twice on my left knee.

There is most definitely something going on with us that can be measured.

Glad this is open access. The findings regarding reward and affective processing are fascinating. I wonder if these findings might help push the discourse beyond neuroanatomy, toward the sociocultural and anthropological dimensions of meaning and desire, where body, identity, and sociocultural constructs intertwine.