"Estrogen makes you crazy & testosterone makes you stupid"

Can't recall where I first heard the above, but the following cartoon (from Jan Eliot's very canny Stone Soup) nails my own personal theory that the primary development between ages 14-21 is physical--not cognitive. The young lady depicted pretty much articulates the (classically inarticulate) perspective of an awful lot of faux-jaded, faux-sophisticated, big-sunglassed, SUV - driving - text-messaging types in our general education undergraduate classes: