Recently my DD asked me why the out house we used was set up for two people to use at a time. Got me thinking about what the reasons might be for two or even three hole out houses. I know when we had our cabin the out house there was a two seater, we just used the extra one for the slop bucket. Which is what I explained to her. But really why would you need a three seater? Any one really know the story or idea behind these?