I was completely inappropriate when about 3, which was back in 1976/7....
I kind of remember some of it, but think my memory has been embellished by the retold tales to embarrass me over the years. Basically back in the 70's Norfolkshire did not have a large ethnic community (still doesn't!) - and on a bus with mum going to Grandparents the biggest , what's this weeks PC term, black dude, with the worlds biggest afro got on.. it was seriously mega afro hair... and yes, I do remember him... now I had not seen any afro-american / african gentleman before and was most excited by the "real live golly***"
The good part of the story was he was totally cool and funny about it.. remember him patting me on the head (or was it slapping me?")