When I was single, once I realized breaking the ice was 80% of the battle, my world opened up. People already have a good idea if they like you or not within 1

When I was single, once I realized breaking the ice was 80% of the battle, my world opened up. People already have a good idea if they like you or not within 10 seconds. If their cues aren't that of someone trying to exit a conversation then you have the green light.