On a recent departure from Cdg to return to the U.S., the pax across the aisle had an oder that would knock a buzzard off of a manure wagon. I got weak at the mere thought of seven or eight hours across a narrow aisle from the source of bad odors. Just prior to closing the aircraft door, he moved to the rear of the plane. I guess he snagged an unoccupied row. I didn't go back to check. Great move for both of us.