[polymuser]

Leftists/progressives/D’rats are adult children.

They have an adult’s body, but their intellect is stuck around puberty/adolescence.

Hence all the emotion-based thinking, inability to deal with failure, inability to think logically, propensity to lie and the potty-mouthed 8th grade ‘humor’.

[DennisR]

Absolutely. Arrested development for sure.

[Does so]

Incomplete development of the adolescent brain.

Let's see, what readily-available substance could cause that?