David Schnarch is a sex therapist and author of Passionate Marriage : Keeping Love and Intimacy Alive in Committed Relationships. This book talks about differentiation and enmeshment.
FOO means Family of Origin. That was a hard one for me too, took me awhile. Family of Origin refers to the abuse, neglect, unhealthy boundaries, and things you were taught (one way or another) by your family while you were growing up. That's my understanding of it anyway, if anyone else can describe it better, please do!
Nicky
"There are two types of people -- those who come into a room and say, 'Well, here I am,' and those who come in and say, 'Ah, there you are.'"
Frederick Collins