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. People buy from people they like. Granted they don't like busy work or feeling like they're in charge of corporate stupid pet tricks, but they do like to feel like it makes a difference whether they come to work or not. Four blondes meet at a bar. Now, while this may not be a challenge to some of you non-blondes, look at the motivation, energy and joy of breaking the barrier.