Most Helpful Guy
When they have a clear understanding of the difference between love, lust, and friendship.
It doesn't have an age, its seen as early as middle school. I think it just matter that the dating is healthy, and otherwise appropriate for its time frame. a lot of people would assume sexual activity comes with dating but it doesn't have to.
I say with adult supervision that can date under the age of 18. After 18 well it doesn't matter. Its hard enough dating anyway because most can't even afford it nowadays