Some vehicles, like the Beatle, are definitely bought mostly by women, while others like pickups are bought mostly by men.
If the actual question is what is the breakdown between sex of drivers of Ford Fusions, from what I have seen, I bet it is pretty even between men and women, but I don't have actual statistics to back me up.
Link is to a study by truecar.com on gender differences in car purchases. At the extreme ends, 60% of Beatle buyers are women and 87% of Porsche 911 buyers are men.
http://blog.truecar.com/2011/04/07/study-reveals-men-go-for-looks-women-opt-for-practicality/
They only list the most extreme differences, and I bet the Fusion falls in the middle.