I did not read all of this thread. I apologize if my post is redundant.
My wife and I were involved with a young black bull for nearly 2 years. Early on, after watching them fuck, when he left, she told me she liked the arrangement and that I should "see to it that he's happy". I agreed. I loved watching him pleasure her. So, when he told me she was asleep and I needed to finish him off, I knelt to oblige. I had never sucked a dick before but was trying my hardest when she appeared and told me it was "the hottest thing" she ever saw. From that day on, I was expected to fluff him for her, expected to finish him if his relentless sex became too much for her to continue. I learned to deepthroat his cock (large one... 9"+) and swallowed whenever necessary.
It's not something I had ever considered before. Not something I ever fantasized about before. Now, I want it to be a permanent part of my life. I found his power (enabled by her) delicious. Then, after a time, I found his cock to be delicious.