Makes sense that baby boomers had more drive or gusto to fuck. Entry level or labor based jobs paid more fairly, meaning more time at home. There's a lot less stuff to distract you from the menial task of living. Meaning you can read a book, watch the three channels on the TV, listen to your records, do drugs, or you can fuck people.
Nowadays, work consumes the schedule of most people, there's tons of devices to provide limitless distractions, going out to eat somewhere nice costs more.