<modsnip> I provide training to folks with respect to social engineering. IMO, females tend to trust people more often, and often are reluctant to ask for verification when the situation or the environment makes it awkward. This is something that sneaky folks exploit.
The book from one of the most prolific hackers, 'The Art of Deception' shows how easy it is to fool folks. In my experience, it is folks that are in professions that provide compassion, caring and trust, that are the most susceptible to social engineering.
For an introduction to how easy it is to fool someone, google, Free Pizza The Broken. It's a short video.
MOO