When my wife and I were first married, my nipples were so sensitive I wouldn't even let my wife touch them. Over many years, she worked diligently to make me overcome that. She worked very patiently, desensitizing them and teaching me to enjoy having them touched. She discovered that not only were my nipples very sensitive, but they were like little magic keys. With them, she could get such amazing results; she could turn me on so much that she could get me to do almost anything she wanted. Playing with my nipples for extended periods seemed to make me feel submissive, but I never told my wife that.
One night a couple of years ago, I was sleeping in hot weather without a top on. Somehow my wife bound my wrists to the top of our bed while I was half awake. When I awoke fully, she was naked, gently teasing my nipples. She just touched one with the tip of her finger and rolled it sensuously, until it got as hard as a little cherry pit. As my eyes opened, she smiled and spoke very sweetly to me. She told me that she was taking control and was sooo glad that my nipples were now so sensitive that she could get her way with me through them.
She played with them long enough to get my cock hard as steel, and as I got more and more turned on and began to squirm from it, she told me that she wanted me to want to please her, to desperately need to please her. When I nodded and told her that was what I wanted, she smiled and said, "Good, now we can get serious."