Bathroom Stall

Has anybody every considered that the first and last stalls in a public restroom are the cleanest ones in the place? Long story but Brittany and I were told this by a woman while doing community service this past weekend. When I really thought about I realize the woman was right. I never use the ones near the wall and I never really see anyone using those ones. Everyone goes for the middle. Why? I haven't any idea but for whatever reason it seems to be true. All this time and no one ever told me.....just figured I'd share my new little secret with all you ladies.