Some do, not all of them, depends what kind of lady your trying to pick up and what sort of relationship your seeking for. Don't be to confident now, than this will come off as cocky, but if your looking for a one night stand and not a full fledged relationship than go ahead, be cocky, for some crazy reason lonely thirsty chicks love it.(;
In what way does he show he's confident. Does he have a sexy swagger or disposition then yes. Does he ask every girl he meets for her no when he's single. Does he always have more than one girl on the go on a casual basis. Then Hell No!! ""One mans confidence is another mans downfall."