Warning: some of the non-verbal flirting techniques outlined in this section are very powerful signals, and should be used with caution. Women should be particularly careful when using signals of interest and attraction. Men already tend to mistake friendliness for flirting; if your signals of interest are too direct and obvious, they will mistake them for sexual availability.
…Even from across a crowded room at a party, you can signal your interest in someone merely by making eye contact and attempting to hold your target’s gaze for more than one second (not too much more, though, or you will seem threatening). If your target maintains eye contact with you for more than one second, the chances are that he/she might return your interest. If after this initial contact, your target looks away briefly and then looks back to meet your gaze a second time, you can safely assume that he/she is interested. If these eye contacts trigger a smile, you can approach your target with some confidence.
… (Males please note: 80% of women think that they are too fat. In one American survey, women were asked what were the three words they would most like to hear from a male partner. The most common answer was not, as expected, “I love you”, but “You’ve lost weight”. While you should not make any comment on a woman’s figure unless you know her well, this compliment might please a girlfriend or close female friend.)
… There is no need for elaborate attempts at wit: a simple twist such as “Lovely day, isn’t it?” during a torrential downpour will raise a smile if your target finds you attractive. (If your target does not find you attractive, more elaborate efforts will be no more effective.)