Does drinking water on the regular keep you "regular"?
Yes, the human body runs on water and it keeps us in a natural state of equilibrium and keeps our body running healthy. Now by "regular" if you're referring to a menstrual cycle then I don't know.
Yes, it will help. Your body needs water to flush things from your system and that means from both the urinary tract and the digestive tract.
yea and helps your skin also