As a teenager when I started having sex (at 14 in 1977) I never wore condoms with guys and only did with a girl if she wasn't on the pill (Catholic School you know - can't get knocked up and have to deal with the getting married keep the baby thing). I had a good 6 or 7 years before the nasty latex sleeve went on, and as I was already well into the kink and leather scene by the time I was 20, but I dutifully put a sock on it for years - though I was about 65% top 35% bottom at that time, I almost gave up bottoming completely as I had severe reactions to the latex. I found out I was poz as soon as they had a reliable test - since at least 1985, possibly longer as I'm a New Yorker and this was one of the original areas of infection. Started barebacking again with a few poz buds around 1996, assuming that we already had it and couldn't bother anyone else.
Finally got reminded that I enjoy bottoming once there's no latex, and started getting fucked again. Adding in some Party Favors has allowed me to really enjoy being fucked, and my ratio is more like 60% top 40% bottom now. Will not wear latex as a bottom. One or two negative buds are so hot I will put a sock on for them, but mostly play with pig buds and specify BB.