There's a genetic type of scarring disorder that runs in my family so when we were kids the rule was we could get our ears pierced when we were adults. My understanding is my mother actually had to get surgery to fix the scarring on her ears after having them pierced as a child.
Anyway, I did ask about it a few times, but never consistently, that I remember (I'm not very girly) My sisters were a bit more persistent, but the rule was firm. When we were very young, we used stick on earrings- you know, those cheap puffy sticker ones? When we got older, my mother found clip on ear rings for us. These worked fine. When I grew up and went to college, I wore a different kind of fake cartilage ring for a year while I made up my mind if I really wanted it done. Honestly, if my roommate hadn't offered a piercing as a gift, I might have just kept wearing fakes.
As adults, I think 2 of my sisters pierced their ears. I have one cartilage piercing, but not my lobes, and one sister I think has none. In any case I'm glad my parents didn't give in to requests to get my lobes pierced as a kid. As an adult, its not something I wanted, and I'm quite happy that we had to wait.