Check out The Last True Story I'll Ever Tell : An Accidental Soldier's Account of the War in Iraq by John Crawford. I heard the author interviewed on Air America Radio's Al Franken Show.
Crawford said that poop was one of the worst things about serving in Iraq. American bombing decimated the plumbing
infrastructure and sewage treatment plants. Now, poop in Iraq has nowhere to go.
The everyday Iraqi was not a tent or cave dweller. Before our invasion, they lived in houses with toilets just like us. Now they have to poop in the street.
American soldiers have to poop in the street too. They can't install a port-a-potty, which would shout, "Suicide bombers! Come here to kill the Americans who destroyed your toilets!"
To compound the problem, American soldiers use toilet paper. Iraqis do not. Like most Middle Eastern people, Iraqis splash their assed with water with their left hand. So, now the streets of Iraq are filled with Iraqi poop, US soldier poop, plus literally tons of used toilet paper.
There are no sanitation services, either. So no garbage has been picked up since we dropped the first bombs three years ago.
Imagine how all this smells on the average 100-degree day in Baghdad. In his book, Crawford describes how our troops smell this stench and step in human poop a hundred times a day. And they puke at first. But eventually they get used to it.
Crawford details his ultimate "get used to it" experience as a soldier in Iraq: He stepped in human poop as usual while heading into the mess tent to eat. He felt a weird crunch in the cleats of his Army boot. He looked at his boot sole and saw that the cleats were clogged with brain matter and bony skull fragments -- maybe Iraqi, maybe US, plus the usual human poop. He used his fork to scrape out his boot sole, and then used it to eat his meal.
Kinda puts the hand-washing debate into perspective, huh?