Well, for me, I'm bi anyway and its probably my favorite thing to give head, so as long as the guy is good with it, it is a good time!
The wife and I both topped off a past fling and funny enough, I had put in the work, she hits her knees and joins me and ends up swallowing most of the reward. Grrrrr! lol
Tsk tsk tsk, selfish selfish.
It doesn't matter to me. I've done both, though the guy who came deep inside her, he sunk his cum so deep inside her, I didn't really get to clean up a whole lot when giving her head.