Mysterious people exude a certain allure when you first get to know them. They keep us on our feet. They keep us guessing. They keep us yearning to learn more about them. I know this firsthand -- not only because I dated a couple of mysterious girls, but several I've met over the years have cited "mystique" as one of my most magnetic qualities. Being mysterious can certainly work to one's advantage during the courtship stage, especially if the object of your affection is very attractive and used to having people fawn over him or her. However, once things get more serious, it can be detrimental to a budding relationship. If one still seems mysterious after, say, five or six dates, it comes off as them hiding something, or shows an inability to open up. Naturally, most people would find such reticence a little off-putting, especially if they see the other person as being long-term material. I would let my guard down as soon as I felt comfortable enough with ...