Consider this a kinky fairy tale:

Once upon a time a young man named dirk had unprotected BDSM sex and got Hep B. He didn't get over like most people do -- it's still in his blood, and he can give it to any man (or, highly unlikely, woman), through unprotected sex and exchange of bodily fluids, especially blood. This the Good Doctor Fairies call "Chronic Hep B Poz". It's a first cousin to "HIV Poz" -- kissing cousins, if you will. However, there IS a vaccine for Hep B; not yet is there one for HIV (though things are looking very good). The Good Doctor Fairies made a sad face and told the boy dirk that there is no cure for chronic HepB+. He would always have to be careful, and truthful.

This young man dirk was a loving man, despite his outward kinky and perverted appearance -- NEVER WOULD HE KNOWINGLY AND/OR DELIBERATELY EXPOSE ANYONE TO THE POISON IN HIS BLOOD. His blood, like that of those with HIV, was like the Witch's poison apple -- toxic. Like with the apple, his blood could kill someone.

dirk gradually learned how to live with his condition, and was happy again -- but always very, very careful.

Then he discovered some very strange wanderers who either wanted to give poison apples to as many people as possible, or to eat as many poison apples as possible. Humble simple dirk could not understanding this confusing desire to either kill people or commit suicide.

Several years later young dirk created a small kingdom out of unclaimed land. But he proclaimed that anyone dealing in poison apples, whether to give, or to eat, WOULD NOT BE ALLOWED INTO HIS KINGDOM.

And as far as I know, everyone is still living happily in this kingdom.