Hmm. I'm assuming you are speaking of a hairjob; I have given my husband a hairjob, and that was a couple of years ago. He is not a "hair guy" but he did comment that it did feel like silk stroking his cock. I didn't like what it did to my hair, so we didn't try it again. It was fun tho .
Back in the early 90's I lived with a boyfriend and he had a thing for long hair. He liked for me to ride him and bend over enough so my hair was stroking his face and chest while we were making love. That was as far as it went with him tho. I didn't know about a hair fetish those days, but thinking back on it now, I'm pretty sure he had one.
Leona