He wants it... and he'll do whatever it takes to get it. Construction is a dirty job. Jack is looking for a new job. When his prospective boss ends the interview by asking "Want it? Cum earn it!" he is more than willing to prove just how hungry he is. His oral skills are above par and he demonstrates that he can take a reaming from his boss - the deeper the better. Whether it's in the locker room, in the back room where the glory holes are, or getting rid of that morning wood "family fantasy" style, these working men will work you over and work you out until you have no more spunk to spew.
