Before starting college in the mid-70's, I think I knew of only one gay guy at high school. They were seldom seen on TV, and if they were, they were usually comic relief.
When I started at college in the theater department (yes, waste of time major), there were gays coming out of the woodwork. Those of us who were straight had to go through all the usual steps to date girls - take them out, buy them things, etc. The gay guys were more like, "come over to our place and we'll have sex". Young guys who were inexperienced were being introduced to guilt-free/no requirements instant sex and many of them jumped into it. There was no "gay dating" or talk of "gay marriage". It was just "let's do it".
Going against the natural order of things creates chaos.