Interesting you say about the shaving and thicker hair. My grandmother shaved my aunts hair when she was very young. But didn't do my mothers. My mother has the finest hair I have ever seen, I'm not too far behind.
My mother always says that she wished her mother had of shaved her head too because she says it made a big difference to her sisters.
They didn't do hers because they left it a little late and she didn't want to go to school shaved, whereas they did her sisters when she was a toddler.
Can I ask what is the significance to your culture?? Just interested.