For some of us, that might mean rocking a new pair of pumps and a tight-fitting dress, while others of us might feel more confident in a straightforward shirt and pants. Maybe you struck out with this person, but someone else could notice how your confidence seems untouchable. Use open body language. It'll seem that much sexier when you reveal more. Sex appeal is hard to pin down—it's a quality that draws you to someone, powerfully and instantly. Channel your inner Sinatra and class up the joint if you want to up your sex appeal.
For instance, if you're asking someone out and they don't know where to eat, don't hem and haw along with the other person—make the call and be done with it.
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Confidence and flirtatiousness are universally sexy, while more specific tips and tricks break down along gender lines. If you want to stick in your flirt's mind, you've got to leave them wanting more. If you're struggling to think of things to say to someone you're flirting with, ask questions and try to look for the next opening in the conversation. Studies show that men are turned off by both overly-cool and calm prospective mates, as well as hyper-stressed partners. Women appreciate compliments about their grooming, their personality, and their humor not because of vanity, but because women appreciate generosity and attentiveness. This doesn't mean you have to be an alpha jerk—there's a difference between taking charge and being aggressive or condescending.