Mulcahy doesn't respond, not really; he's too busy making a mess of Hawkeye's shoulder, and it doesn't look like he's letting up anytime soon.

"It's been s-such--such a long time--"

And back to being a blubbering mess. It's fine. It's hard to be embarrassed anymore. He's got to do something with this well of grief that no amount of confessional to Abe or God could ever soothe.