I think it really matters on maturity. If your ready for it...
I've had sex a few times so far. Im only 14. It's a fun thing, but attaches you HARD to that person. Then when the breakup comes it tears you apart inside. So it really depeonds on if your ready for a reltionship or not.
It all depends on what type of dating you are talking about. There are so many types of dating, and as you get older it gets more seriouse. So as far as I'm concered there is no correct age. Let the kid learn as he/she grows. The more you date the more you learn about capatability, and the more you learn about compromise.
I agree that there are different times of dating. My sister who is a year younger than me dated in middle school but I think it was more of just being friends. Once you get into highschool the relationship can become more serious and meaningful. The age that one should start dating should be between middle school and highschool. Any time before that and it's more of them being just really good friends.
I had sex for the first time before JHS. + I'm pretty sure I wasn't the only one in my grade @ the time. I hear the kids in my old elementry school are still getting caught with their pants down. It's just something that happends.