My older lo is 4 and i think she's asked me twice. Both times it was about something I didn't realize she didn't want shared. One time it was about how one of her friends treated her and another time it was something I thought was really cute she did. I asked her about it later and she had her reasons. Even though I remember being very self conscious as a kid I was surprised with how young it started.

Looking at the other thread made me start wondering if me and my LO just got self conscious at a younger age than most or what age it started at for others.