At the risk of offending a lot of people, let me first say that I'm a blonde and, on top of that, a blonde from Texas.
Every employee learns what it takes to get a plane quickly in the air.
No meals, no frills. Flight attendants make fun of the bump and hustle to quickly get on the plane and off the ground. Taking less time to turn-around planes means they need fewer planes. Blondes can do that math. Hence, the first Principle of Blonde Engineering.