So I just saw a new show on MTV called Catfish (based on the film) which made me think of this thread. A cautionary tale about online dating!

This woman friends a guy on facebook who says he is a very successful 18-year old model who is also taking online classes to be an anesthesiologist AND also on the side works for Chelsea Lately writing cue cards. They become boyfriend and girlfriend and the girl is so smitten she has wedding magazines on her coffee table. Unsurprisingly, he turns out to be a fraud: "he" is a lesbian living in Alabama.

The lesson is: don't go 8 months without meeting someone in person, or at least skyping! Actually, it was really sad. I don't know how real it is, since it's a reality show, but it was depressing and left me feeling really uncomfortable.
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