In the early 80's it wasn't clear how HIV was transmitted, there were also many conspiracy theories even though internet wasn't in our homes.
https://www.youtube.com/watch?v=1LKJ5ZzzL0w
Later on it become clear HIV was transmitted because of anal/vaginal sex without using a condom and easily preventable using a condom. It wasn't the lifestyle like the video says, it was the choice of wearing a condom or not and most of us adopted ourselves while others took chances.