Boys and cars

Is this a sexist statement? "Males are fascinated with cars." It sounds sexist, but doesn't it seem to be true? In our house, it is all-cars-all-the-time. Connor wakes up in the morning with a string of car names and it continues until he falls asleep. His knowledge is so amazing. But I just don't get the fascination. Most of the cool gals I know don't get it either. For now, I guess it will be just another one of life's mysteries.