Watching this with the nine children on the farm made me think. They are all aware from a very early age of the facts of life. They see the mating and birth of all the farm animals.
Such a difference from my early life.
I asked mum where do babies come from when I was 11/12 she said I'll tell you when you are older. I learned from school.
When she sort of told me about periods she didn't tell me where I would bleed from. So I was constantly looking all over my body, arms legs everywhere looking for bleeding.
She was so embarrassed regarding life's intimacies it was a real problem.
I don't think it's avoidance. More likely discomfort about discussing a topic they have been taught to be private and are embarrassed about. I know my mum never really explained anything to me...it only got mentioned once when she was still under the influence of anaesthesia after an operation.
I was raised as a Catholic. One evening I was given a book called My Dear Daughter to read. I was told I could ask questions if I needed to.
The whole class had been given one and we sorted it out between ourselves re periods. Extracts similar to .... you may not touch a boy after this time... were not a great help!
Sex education came from biology in secondary school at 12.
My mum was great she answered every question I asked without embarrassment. We discussed things in detail. A very modern Mum in every respect back in the 50s 60s.