My hair was straight untill I turned 10. Now it gets really curly. Why has this happened?

Question: My hair was straight untill I turned 10. Now it gets really curly. Why has this happened?
- Keywords:
  curly,
  hair,
  straight
Asked by cookieland to Ed, Sam, Steve on 23 Jun 2011.
- Sam Tazzyman answered on 23 Jun 2011:
  
  I used to have very straight blond hair and now my hair is quite dark and a bit wavy and much thicker. I don’t know why it changes, but then one’s body changes a lot as one grows so I suppose it’s not that surprising that this includes hair.

Question: My hair was straight untill I turned 10. Now it gets really curly. Why has this happened?