Are girls of 18 radically different than 25?

In my (31m) experience they seem less mannered and more chaotic. They think far less about how they come across than older women. Also seem to think they know everything.

It is much harder for me to read them. I often think they lack interest and than suddenly they want to meet up again.

When hooking up they firmly criticize all kinds of things like my bedsheets and choice of furniture whatever and than praise my wallpaper or coffemugs etc.

What bothers me the most is the texting. They seem to forget about me a few days to be enthousiastic days later.

How do I handle teens?

Opinions thoughts?