I guess I'm old enough that most of my peers got The Talk. My parents sort of copped out; when I was 10 one of my Christmas presents was a science-for-kids book which included a section on reproduction, with special attention to how people did it.
Which leads towards my point. I don't think The Talk is necessary any more, not so much because of increased cultural sexualization (which is happening anyway) but because information is so much easier to find; Google "Where do babies come from?" and the mystery is solved. We didn't have Google in those days, after all. We didn't even have Internet porn! We had to steal Playboys from our older cousins, and if we didn't have any of those around, it was National Geographic or nothing! You kids today have it way too easy! Get off of my lawn! Young punks, mumble mumble, where's my Metamucil, oh it's nap time already...