Stress can do that to a person, and there is no better stress release than absorbing yourself into a moment of passion. At least as far as Angel was concerned, in life and in death it was the only thing that made his mind stop even for a second.
So some of that out of character-ness for the other might had, had more to do with Angel than Dick.

"We fucked guy." It's down, it's dirty. It's what it was. Angel got sucked into the moment, thankful for just one second of something that seemed so familiar and comfortable. Even if it was vastly different than what he had been used to it had been fun for him but that was what it was, a bit of fun. So he puts that distance now, because its clear this is a struggle for the other. "It was a bit'a fun, to combat a bit'a stress."

Angel clung a set of hands to the coffee in front of him until he goes white knuckled, not that anyone can see thanks to the addition of his gloves. "But it don't gotta go anywhere my dude. Listen; it's been a long ass time since I got to just, fuck and not have to deal with someone tellin' me how I'm doin' it or how much I'm takin' in for it. So lets maybe just leave it at that?"

It's probably not the best answer but maybe it will be easier for the both of them if they don't think too much about it. And then, just because... "And just cause we fucked doesn't mean you're anything. So maybe just deep breaths guy. Don't think too much about it. No one back home if ya get back there ever gonna know."