I don't remember my family in the 1950s giving me a clue about the names of sexual – or, indeed, many other organs. I think that all happened in human biology at school and the little booklet my mother gave me as I approached puberty. I always used proper biological names – for boys and girls – with absentdaughter.
What I do remember is ex-absenthusband telling me that I was completely wrong to teach her the word penis, as she should have a warm and friendly familiar nickname for it. I suggested that, since she was a young girl, natural but not necessarily warm and friendly– and certainly not a familiar nickname – was the wisest choice.