You mean the first time we heard the Stones, while consciously knowing it was the Stones, and who the Stones were? Or how we got into the Stones?
Cause I have no idea when I first heard an actual Stones song, and I don't even know when I heard a Stones song knowing they were *THE* Stones.
But I do know that I've been *aware* of the Stones ever since I've been aware of myself, especially Mick's mug, which was everywhere at the time (circa 1983-4).
Got into the Stones by first hearing/liking some of their 60s songs, then picking up Some Girls and hearing it for the first time sealed it.