Hi there,
It was suggested to me by my partner's aunt that I should give my baby some water in a bottle as it would stop her using me to suck for comfort, and would also satisfy her if she was sucking due to thirst, as opposed to hunger.
I've never heard of giving water to a BF baby, might it not 'trick' her into thinking she had eaten, but actually not give her any nutrients or calories?
The aunt has breast fed 5 kids by the way, and is a huge BF supporter.