He seemed to have a built-in radar for finding the available women at the right time and getting them to go with him. Research by animal courtship behavior zoologists and behavioral scientists reveals that male and female animals use a series of intricate courtship gestures, some obvious and others subtle, and that most of this is done subconsciously.
In the animal world, courtship behavior in each species follows specific and pre-determined patterns.
Human flirtation involves sequences of gestures and expressions not unlike the courtship dances of birds and other animals, as seen on wildlife programs.
The bottom line is that when a person wants to attract the opposite sex they do so by emphasizing sexual differences.
Those who were interested would return the appropriate female signals, giving him the non-verbal green light to proceed to the next stage.