You know what, I have that movie on the hard drive plugged into my TV right now, after I write this I'm gonna go back and watch that scene again, sede what I come up with.
Looking back now I used to think he reminds her of her own father or the father she wishes she had, and perhaps feels embarressed knowing what she has been doing when there is a man of such purity and heart sitting in front of her.
Or she realises this is the type of man she wants to be with as she grows old, genuine, loving, talented, sharing, rather than being dominated and fucked with by John.
He also says that he only 'remembers when to eat and when to sleep', perhaps just reminding her of the fundamentals of living that she has been missing out on because the choice is not hers any more.
Maybe the surroundings are enough to break the spell; being surrounded by all the colors and the art, and all that influences the old man pulls her from her obsession and realises she does not want to be surrounded by Manhattan greys and black pleat skirts while living out her life in a penthouse dungeon in NY.
I'm gonna watch it shortly and come back!
Last Tango is not a movie I'll ever weatch again I don't think, that is possibly the closest we'll get to seeing a real rape on celluloid in the name of art! Go Marlon! Go Bernardo!