Because I own a car that has Daytime Running Lights, I never turn off the headlight switch.

Odd. Never knew cars would do this. Mine turns on the daytime running lights the second I pull the gear shifter out of park. Turning on the headlights results in the parking lights first, then another notch will turn off the daytime lights and turn on the normal headlights. The headlight line is only high when the selector is moved away from the "off" position.