Phil:
"I watch the Nelson Family shows now - they're still showing them. Pardon, but many of them are pretty corny...."
Yes, many of them are, but Ozzie and Harriet is deceptive. It had quite a few things going on that were very untypical of sitcoms at the time.
One was that Ozzie and Harriet shared a double bed. How they got away with it, I do not know - a double bed was still taboo in the movies when the show began its run, and even in the '60s, Dick Van Dyke and Mary Tyler Moore were kept in twin beds by CBS's Standards and Practices department. But the Nelsons bedded down together, years before anyone else on TV could.
Rick and David were very young when the show began, but as they got older, there was no attempt to keep them artificially young - or innocent. Those boys went through puberty on the show, getting more and more involved with girls as the years went by. Their dates were usually "single" dates, not the double dates other shows used to keep an innocent facade. And the young ladies involved were very choice specimens - Tuesday Weld was one, and Ms. Weld was as close to a sex kitten as would be allowed on TV at that time or for some time to come. While Harriet often enforced good manners with her boys, there was never any hint of her disapproving of their obviously developing love lives.
There were occasional storylines involving other races or ethnic groups, and the show always treated such groups very respectfully. In one episode, "The Duenna," Rick dates a Hispanic girl, and there is not the slightest hint that anyone thinks there is any sort of a problem with that. Later, after the show ended in '66, Ozzie wanted to do a sort of revival with a show called Ozzie's Girls, where Ozzie and Harriet rent Rick and David's now-empty rooms to college students - including an African-American coed. This was television's first-ever instance of an African-American living with Caucasians on a basis of equality.
And Ozzie was fully in favor of Rick's career as a rock 'n roll singer, at a time when that musical form was still considered somewhat disreputable (Rick's first hit came in '57, the same year Ed Sullivan decreed that Elvis could be photographed only from the waist up on his show, in order to conceal Elvis's thrusting, swiveling hips). It was a controversial move at the time; Ozzie was taking a real chance that adults - who controlled the TV set in most households of the era - would veto their kids watching Ozzie and Harriet because of Rick's music.
So, don't underestimate the Nelsons! P.S.: Ozzie was a flaming liberal, a trait he passed to son David.