DS1 - has a dummy and we 'lost' it when he was 8 months old....never asked for it BUT substitued it for a drink in a bottle...not a good move
DS2 - never wanted a dummy...screamed more when he had it..phew
DS3 - had a dummy for not even a month and it was barely used....YAY!!!

BUT

DD......man she turn's 4 next and we only just got rid of the dummy LAST WEEK . She would drive us nuts crying ALL NIGHT plus she had high anxiety and it was a comfort thing. I spat it and took it from her last week. She was a hand, finger, nipple sucker as a NB....so if you do decide to go down that path just make sure you dont do my mistake and keep it to long