I feel somewhere wrong, a sign that explained the manner of the toilet

It is a picture of a signboard explaining the manner of toilet in detail.

However, the example of "I can not use the toilet like this" is a signboard that feels somewhat wrong due to just unlikely examples.

the detail is right below.
Does not use the toilet on the right side of the first row, do not use the toilet to vomit on the left side of the second row? The following three are clearly impossible examples only.


Then it seems that this is a sign of a toilet that was in Seoul, South Korea. What does that mean? This is ....
Korean unisex toilet? On Flickr - Photo Sharing!


Apparently, overseas, there are various toilet signs that you can not see in Japan.