Everyone has put wayyyyy too much thought into this.
First of all I sweated more with hair that I do now and it looked awful!
The easy solutions....use your hand like a squeegee and wipe it to the back of your neck
or, roll the car window down and stick you head out (this also helps when your whistling or yelling at hot chicks
) or, swing into a gas station and grb the towels from the window washing area
Or you can us a headsweat, doo rag or hat as others have suggested but I try to keep stuff off the dome
Not sure about rubbing a stone on my head.... I could sit in a park and hum while I do it