What a hallowed genre Obsessed is a member of! Right up there with such psycho stalker greats as Play Misty For Me, Fatal Attraction, and The Hand that Rocks the Cradle. If you'd like to remember a few more, Peter did a great list for Valentine's Day ... and would you look at that, 5 out of 7 of those are chicks! Why the persistence of this cinematic archetype? Why don't we ever see psychotic male stalkers beyond Sleeping with the Enemy? Where's Fatal Attraction where a man is screaming, begging not to be ignored?
My theory has always been that we see these stories played out again and again because they're somewhat of a male fantasy. Think about Play Misty For Me, Fatal Attraction, Obsessed, or even the real B-movie variations like Swimfan, The Temp, and The Crush. There's something very flattering and erotic about a woman who can't get enough of you -- a plot point exploited pretty heavily in Play Misty and Fatal Attraction, since both male protagonists really set their stalkers off by ... sleeping with them. If Fatal Dan and Misty Dave had just taken Alex and Evelyn out for a nice dinner and a movie, no sex, would any butcher knives have been wielded? I guess so, given the chaste plotline of Obsessed: just flirting is enough to drive Ali Larter over the edge.