It would take three generations of brain washing (The brain DOES need to be cleansed of filth) to get back to the 1950's
Sadly, ya can’t put the genie back in the bottle. We’re living in Sodom.
There may be more truth to that than you realize. Sexual predilections, being as powerful and hormonal as they are, induce environmental stresses that may be physically heritable. They could produce changes in messenger RNA (not DNA) that are referred to collectively as "epigenetics," physically heritable traits (including behavioral) that are not in DNA. I remember an amazing experiment with stickleback fish behavior that showed environmentally induced behavioral effects to be sufficient to cross the species barrier even in hybridized progeny.