This is just a thought.
I feel that people already know someone, male or female, that is their dual but don't realise it. Why would you come in contact with every other type and not your dual? That wouldn't make sense.
I feel that dual relations are over-sensationalized and glamaorised that people are looking for something really great - something larger than life. But the liklihood, in my opinion, is that you have come into contact with people that are your duals, but just have not realized it.
Please tell me your thoughts.