I can't make my mind up about this, sometimes I hear it and sometimes I don't

There's a lot of noise going on there anyway, what with all the heavy breathing, and their clothes rustling, and we'll probably never know for sure unless Jake or Heath decide to tell us one day
I agree with ksxks, it doesn't really bother me if it's there or not. If it
is it would fit perfectly within the raw nature of the scene, and if it isn't, it might as well be, cause actions speak louder than words, and Jack's actions were definitely saying it loud and clear!!

:o