Sex Tips for Red-State Girls! By JENNIFER SENIOR Published: July 4, 2004 Ever since she qualified for a car award from her employer, Passion Parties, Linda Brewer has buzzed around the South in a silver Cadillac Escalade with a license plate that says ''Funlady.'' On the road, men often notice it and honk before passing, only to realize, with baffled amusement, that a woman of nearly 60 is at the wheel. ''Hey, girl,'' she shouted the first time we met, as she smiled and waved from the car window. ''Climb in.'' Passion Parties is a direct-sales organization based in Brisbane,...