Well watered

I gave blood yesterday and I drank so much water during the day to keep myself well hydrated that I ended up going to the bathroom once an hour during the evening. And I had to go so bad that it was almost painful. I think I kept myself well hydrated.
The reason I felt this was so important was because when I gave blood a few years ago, I didn't drink much water afterward and it was not good. I was in my parents basement and I had to use the bathroom, so I ran upstairs and, as Bill Cosby said, started doing the Lord's business. As I finished, everything suddenly got real dark and then I found myself laying on the floor, which was odd because I had been standing the last I remembered. I think mom must have heard me fall because she called out to see if I was all right, and I said I was.
Mom, if you're reading this - I fainted. I was all right, just in a fainty sort of way.
So now I drink plenty of water.

Grasp the Nettle