Just admit it honey.. we're lost!

Sociologists everywhere are studying human behavior in society. I've got a thesis subject for them.
My theory: there's a direct relationship between the role of men and women on the one hand, and the sales figures for car navigation systems on the other. Two opposing forces are at work here:

• men being unable and unwilling to admit that they're lost or need any type of navigational information.
• women having a nervous breakdown over the pointless driving around as a result of this.

Sales of car navigation systems are proportional to the degree that women dominate men in society.