The Reason Dumb Blond Jokes will always be around.

Last summer, down on Lake Isabella, located in the high desert, an hour east of Bakersfield, a woman, who happened to be blonde, and new to boating was having aproblem. No matter how hard she tried, she just couldn't get her brand new 22-ft Bayliner to perform.  It wouldn't get on a plane at all, and it was very sluggish in almost every maneuver, no matter how much power she applied.  After about an hour of trying to make it go, she putted over to a nearby marina. Maybe they could tell her what was wrong.

A thorough topside check revealed everything was in perfect working order. The engine was fine, the outdrive went up and down, the prop was the correct size and pitch.  So, one of the marina guys jumped in the water to check underneath.  He came up choking on water, he was laughing so hard. Under the boat, still strapped securely in place, was the trailer.