Summarize:

To let someone know you're interested in him, start by making eye contact. Move your eyes to his, hold briefly, then look away. Repeat this a few times,so that he knows you're intentionally looking at him. Don't stare at him. Staring is when you maintain fixed eye contact with someone for longer than a few seconds. Staring can seem aggressive or angry. Pair your eye contact with a slight smile. Make sure to watch his response. If he doesn't return your gaze, this is a sign he's not interested. If he looks back, smiles at you, or otherwise responds positively, that's a sign he's okay with your flirting. Lower your bottom lip slightly so your teeth are barely showing. You don't need to purse your lips, just open your mouth to entice the viewer. The pout is the first stage of the seductive lip bite. Studies show that women initiate flirting 90% of the time. Men flirt largely in response to feeling that flirtation has been initiated by women. A Manchester University study found that men spend the first 7 to 10 seconds of contact looking at women's lips before moving onto other areas. Once you've confirmed that he's interested, initiate the lip pout. Remember that not all cultures share the same body flirtation signals. Maintain eye contact while you pout your lips. After establishing eye contact, lowering your eyelids, or glancing at the object of your flirtation through your eyelashes, is a nonverbal indication of desire. You may want to lower your chin and look up at the person to strike a seductive pose. Some people find themselves naturally blinking their eyes more rapidly. This is also called "batting" the eyes. If this comes naturally to you, it can be another way to add your eyes to the flirtation. If it doesn't come naturally, it might seem like you have something stuck in your eye, and is best avoided. The downward tilt of the chin is said to make women look more "feminine" and flirtatious. Men, on the other hand, are said to look more "masculine" when they tilt their chin up and gaze slightly down their nose. Look at one eye, and then move to the other eye and down to the lips. This will draw his attention to your lips. The reason your eye gaze will draw his attention to your lips is through the tendency of one person to mirror, or imitate, another when engaged in flirtation. Directing your eye gaze to a man's lips is an overtly flirtatious gesture. It's a nonverbal way of indicating sexual interest. Bite tenderly on 1 side of the inner lip for 2 to 5 seconds, before slowly releasing. Maintain eye contact throughout. With eye contact, there's less chance that your lip bite could be misunderstood. Make sure your teeth don't bite your outer lip, as this may appear insecure or nervous. A seductive bite should be gentle, never hurtful. It should not leave a mark. Following your lip bite, you may want to add a slight lick of your lower lip with your tongue. Your tongue is a sexual body part, and using your tongue now will make your flirtatious overture more seductive. Don't overdo it with lip-licking. This can result in chapped lips, which is the opposite effect you are trying to achieve. Continue to make seductive eye contact throughout your encounter. The seductive lip bite is one gesture in the choreography of your flirtation, working together with others.
Make eye contact. Start a lip pout and bite soon after you make eye contact. Lower your eyelashes seductively. Do a triangle gaze. Bring your lower lip in very slightly. Lick your lower lips.