People that age in the early ‘70s grew up in the Depression, lived through if were actively involved in WWII, etc. I’m sure it aged them. I read once what the percentage of draftees/enlistees for the US forces in WWII was who were 4F due to malnutrition but it was a staggering number. But yes, that was also a time when a common promotional in cigarette ads were their alleged health benefits and every movie featured matinee idols suavely lighting up onscreen. The ritzy ones with gilded lighters and the cowboys striking matches on their jeans or boot sole.