Fully agree though as a broad rule but there’s an age of innocence that needs respecting IMO. I got told by an older boy I knew when I was just 8 and honestly that was not great. My own barometer is that if you still believe in Santa we’ll have the talk later.
Funny story - Our eldest had some broad strokes when we sat him down but thought from the playground stories that you used a condom if you wanted to get pregnant. I was very glad to clear that little misconception up.