I'm not sure what your question is to be honest.
The feelings of working together toward a common goal because in this one you have to communicate with the other person.
True. It works the
shoulders. However it can also work the
upper back muscles as well. It all
depends on the grip that you have.
Narrow grips work the upper back and shoulders while wider grips works
the shoulders. It all depends what you
want to develop with this exercise.