It was in the eighties, IIRC, when a Penthouse Variations knockoff called Vibrations was publishing erotic function. There was a serial, IIRC again by a name science fiction author, that was built around a deliberately engineered disease, "Sexually Acquired Neoplastic Disorder".
It was both frightening, but also had some of the best erotic writing that I've ever seen. The premise was that the virus developer's lover had been an AIDS victim in a particularly nasty time of "neopuritans". He developed a virus that was both an aphrodisiac and also specifically depressed immunity to cancer. The virus was spread through a popular "endorphin" used as a sexual aid.
Google produces no hits. I'm even wondering if the author made an effort to pull the story.
Does this ring any bells for anyone?