So even the so called "ugly, fat guy" got laid back then?
Depends on how fat and ugly you're talking. But remember, this was before the obesity epidemic. So there were fat guys, but not like today.
Some guys might be overweight, but they would be husky, and girls liked the bigger guys. The fitness craze was just starting, so you didn't see as many ripped, muscular guys. You can see this just from watching movies from the era. In films now, even the waiter in the backround looks like a musclehead lol. So a lot of girls went for the husky guys.
I live in a pretty conservative area, so even now most people tend to couple up here. The perpetual dedicated singles are there, but definitely in the minority. And there are a lot of married people who cheat, but we tend to know who they are.
I was lucky enough to grow up under parents who had a good marriage. Maybe that's one reason I'm more open to relationships than most guys here.
All the ideas I've read in this thread are good ones, all those factors have contributed to things changing. I suppose we did have fewer indoor activities, and no social media, so we probably did go out more to have fun or socialize.