When I watch the reunion kiss , I think I can hear Ennis say "later" at the time of the nuzzle. just before they break apart. I also think he may say it x2 but not sure. I didn't breathe for the whole time the first time i saw it , blew me away. --- and this was after I 'd read the short story and knew it would happen.It actually looked like he had to physically pull himself away from Jack. The risk he'd taken was huge.
Find me a human being who can watch that scene and not believe that it is totally real, and unbelievably sexy and I'd worry about their soul. It's one of the things that makes me feel Ennis knew he loved jack --- but had no word for it.
Believe me, 20 yrs from now ,that kiss will still be extraordinary.