As World Toilet Day approaches (Nov 19), Jack Sim says more and better toilets will make the world a better place. Wu Wencong flushes out the story.

When you are the founder of an institution like the World Toilet Organization, you need a good sense of humor, and Jack Sim has an excellent one.

You can tell that first from the name of his nonprofit organization - the World Toilet Organization, abbreviated as WTO, just like the World Trade Organization.