What is the best age to start a relationship?

Now listen, I know I may not be the first one to post this, but I'm genuinely curious on y'all thoughts. 

To y'all, what is the best age to start dating?

For me, I feel it's 18 or older. Then you'll be mature enough to actually be able to make the relationship last. I really hate when I see middle schoolers dating. Like, there is no need to start something like that at such a young age. I feel most don't understand the weight of a relationship and just do it cause they can or cause it's like some trend to them.