Personally I don't think there is a "proper age". It depends on the maturity level, the age of course is a factor, but some are more mature than others. Also, it is a decision you must sit down and talk to your parents about. I know from experience no matter what "age" they deem appropiate isn't going to seem acceptable to you.....lol But, listen to them. Show your maturity by accepting what they have to say. Talk openly and I'm certain you can come to a reasonable decision.....together.
I would say 16.. =) because they now growing up and know there standards and what to look for in a guy.. and not date a looser.. who just likes her.. no offence.. same as for a boy.. seance they are older more machure.. and not young and there feeling are crazy emotions going all around them.. they will know more than how to control those emotions..=) and have servicing the whole time.. =) yes no children.. its not time yet.. older like 16 and older.. they will make wiser decisions.. but some will not even date till 17.. =) I rec-amend the age of 16.. =)