Sumo, do you know that this referred to the 70's and 80's?
Yes, I did. I was kind of making the link between people who got HIV through no fault of thier own vs punting bareback, either oral or otherwise, both of which have the risk of transmission.
Seeing how devastated those people were brought it home to me. No matter how small the risk, I will be keeping covered up from now on.
A lot of that decision is due to the views on this forum too, which i have taken on board re unprotected oral. It's be an eye opener listening to the different points of view and I'm grateful for the advice.