Whether posing for a photo or flirting across a bar, you can create magnetism by tweaking your physical expressions. But don't overdo it-as photographer Robert Erdmann used to yell from behind his lens when I'd give him what I thought was my sexiest look: "Don't give me that stupid face! Just look at me normal."

These are a few things I've learned on the business end of the camera:

-Smiling "inside" creates intrigue. Usually you show your teeth when you smile. But if you keep your lips closed, let the corners of your mouth turn up a bit (think of the Mona Lisa), and imagine your eyes glistening, you give off a mischievous, alluring vibe.

-Turning your shoulder slightly, rather than squarely facing someone, can be flirtatious-not to mention physically flattering.

-Arch your spine and keep your shoulders back and your head up to look confident (this can even make your boobs look bigger). Go too far, though, and you'll seem haughty and intimidating.

-Sleepy "bedroom" eyes-relaxed lids and a softened stare-are sexy. Even more so if you're peeking out from behind deliberately touseled hair

-Keeping your mouth closed (you're breathing through your nose, obviously) helps you look relaxed and poised.

-A slightly open mouth can be inviting, sexy solicitation-but make like you're going to eat a blueberry, not a cherry.

-Though laughing can create warmth, guffawing can make you look like an airhead-or a jerk.