Odd thoughts

Why do people feel the need to speak with you when you are in a bathroom stall?
At the sink, I understand.
Over the stall wall, not so much.
I'm a little busy at the moment. Is there something so important to talk about that it can't wait 2-3 minutes?
I also love the people who have cell phone converstations while in the bathroom. Personally, I would think the sound of flushing toilets would really be a deterrent to a deep and meaningful converstation.