[zeroonetwothree]

I don’t think this is an Indian thing, western dentists recommend brushing teeth after each meal.

[tremon]

Curiously enough, mine doesn't. In fact, he explicitly recommends against it, since the tooth enamel is weakened by food and saliva, and brushing immediately after a meal scrapes off the weakened enamel.

Instead, he says it's best to wait half an hour between the meal and brushing the teeth.

[LtWorf]

But people just keep their brush in their own desk :D