Had my fourth viewing last night, and really soaked in that scene after reading all your posts here.....it's such a funny, but tender scene, showing Ennis and Jack's ease with each other by this point, Jack drunk and Ennis ready and willing to talk to Jack without any force....what I noticed last night was, when Ennis was opening up about his family, Jack was listening, but a smile was slowly growing on his face, which was like "this guy can actually talk", and there was an unspoken moment, after Ennis finished talking, and Jack looking at Ennis, when Ennis says "what?" and Jack continues with that line about Ennis saying more then than he had the past 2 weeks.
A beautiful, tender moment that saw their friendship develop and move on to another level....and just another reason why I love this film SO much.
In the story, this scene was described beautifully by Annie Proulx, and ended with Ennis riding out to the sheep, having had a high time, enough to want to paw the white out of the moon. I'd never heard that saying before, but knew EXACTLY what it meant when reading it in context of this love story.