So when my daughter came along it was an automatic rule: no dating until 17. However, the reasoning was a little different. When she begged and pleaded with me to let so-and-so take her out on a date I would remind her that she had to be 17. I reasoned with her that I preferred she had at least a year's experience driving before she went out on a date alone with a guy.
Now my daughter is 19. The other day she was talking about how glad she was that she hadn't gone out with a bunch of different guys in high school and, though it had been really tough with all of her friends dating, she was glad I made her wait. She said, "You were right, Mom."
Wow! I was wasn't expecting that!