<font color="purple">Finaly, someone who understands, I've had this argument before...

Mom: Drink 8 glasses of water a day, 16 fluid oz each.
Me: That's insane, I'm just going to drink when I'm thirsty.
Mom: No, you should drink even if you aren't thirsty because drinking 8 glasses is healthy for you
Me: There is absolutely no way that I'm drinking 8 glasses a day.

That's just that for me, drinking more then what my body is calling for is redundant. Humans have thirst for a reason. Unlike eating even though I'm not hungry, just the thought of drinking (even water!) when I'm not thirsty makes me feel sick to my stomach. Some people are different then others. </font>