There´s nothing against brushing the teeth in the States like everywhere else.
They even advise turning off the tap while brushing them. http://watrnews.com/wp-content/uploads/ ... -teeth.jpg
To kids, it´s advisable to use glass, or even grown-ups that feel they can´t help it.
And with a glass in hand you can go everywhere, you couldn´t obviously with the tap in hand! So, from now on, I decide to turn off the tap and use a glass to hold a small amount of water for rinsing my mouth to manage water more efficiently and have less impact on the environment.https://sites.lafayette.edu/evst100-fa1 ... vironment/