Do you remember the scene when the H. Hunter character is waiting on the
beach with her daughter?  The piano is crated.  Yet, the Hunter character
removes a piece of wood and plays on whatever keys she can.  In this
scene she has to speak/play her sensual music.  Later on, after the
Keitel character makes his proposition, he crawls under her dress while
she plays.  He finds a hole in her stocking.  He sticks his finger into
the hole and touches her ivory white skin, while she tickles the ivories.
Thus, the metaphor completes itself and the connection is further
established between them.  She played a little on the beach, he played a
little on her.
 
Dennis Ross
University of Miami