Once in a blue moon I'll get that unicorn where nipple play doesn't do anything for him at all.
For the most part my friends like anything from light licking and kissing to hard biting and clamps lol.
My nipples are hard wired to my dick. I enjoy clamps and pinching. I have a pair of clamps that make Dallas cringe. I have enjoyed nipple play as a private turn on. Dallas has learned how hard to bite and give me so many cums.