To get back to the topic:
I think there is no point in going out/dating if you're not serious, but there's no point in being too serious about someone at too young an age. i.e. an age at which you don't want to marry yet.
Dating plenty of different people is a bad thing, cos you'll probably start comparing them and then you'll never be staisfied, until you stop.
When you date you get really attached to a person, and then when you break up (which is almost inevitable) your heart breaks and that person is left with a piece of it.