Times change
There's no denying that, when you go back to the time when we were young horndogs, what was considered acceptable for young males is a lot looser than it is today. Exhibits A through infinity: That aspect of our culture was caught on film and in print. That's how we behaved back then, and we can't deny it now.
But by no stretch of the moral imagination does that make it right today, or really, any time in about the last 30 years. Morality doesn't get grandfathered in, fixed in place depending on when you were born. We're all obliged to change with the times, to recognize new, and higher moral standards, and try to keep up.