Mid 80s AIDS scare
If you weren't already invovled, you were without a chair when the music stopped.
It all came down to social coucooning. People you knew for a while were safe, newcomers (no pun intended) were suspect.
This lead to closer to home dating, IE: peers became prospects, new people were shunned.
A seperation of same class social beings became common. Singles were left out in the cold so to speak.Married and soon to be married couples were safe. The
people lucky enough to be in on the inside track of the "safe" were "hooked up".
Those on the outside were left to their own devices. Meet people they are fearful of from the begining.Paranoia and mistrust doesn't make a good
foundation for any couple.
After a while "safe sex" was common place, too little to late for a generation of singles left out in the cold when the music stopped.