INXps can be pretty immature... in the way that they act, as well that they tend to be quite passive, so people might treat them as if they were little children. Next, ENXps can be pretty immature.

On average, rationals are more mature than irrationals. EJs tend to be the most mature, then IJs, then perhaps ISXps, then irrationals in general. XXTps can be quite immature. ESFps... pretty immature.

If it were up to the irrationals, then this world would probably collapse.