There's no reason for males to be acting under 6 in 2018. None.
Why do you think that?
I just don't think it's practical for males to be acting like their children.
I say, live and let live. If someone isn't hurting you, what does it matter how mature they act?
I get that, but I just don't want to see anyone get hurt.
Just because someone acts immature doesn't mean they will get hurt. I think this is something you should not worry about as it doesn't concern you.