Ironically I was in a zoo yesterday with DS1 (11), DS2 (8) and DS3 (12 days old). I started bf DS3 in his sling, and DS2 said, "Should you be doing that here?"
I had to laugh. As I pointed out to him, we were in a zoo FGS and surrounded by animals bf, having sex, defecating in public and all sorts of things. As just another mammal, I argued, there was no reason why I shouldn't join in and bf his brother right there and then. Plus it wasn't as though there was anywhere else I could do it, and his brother couldn't exactly wait.
DS2 looked bemused for a minute, and then ran off to the play area with his big brother (who is recovering from the militant bf lecture he got from me when he suggested I close the curtains in the Dining Room whilst bf in there last weekend)!
I am quite shocked how little bf these two have actually seen since they were toddlers, and it's no wonder we have lost the folk knowledge of how to do it.