Gum Control
Chewing gum is not forbidden in Singapore, contrary to popular belief. That is correct. It has been fully forbidden since 1992, with the exception of a few exceptions in 2004, which allow chewing the rubber for therapeutic and dental purposes exclusively. The gum regulation originated in Singapore because the government believed that it was the only way to control and keep the country clean, and what a clean place it is.
The Unflush Regulation
Singapore is one of the cleanest countries on the planet, and it wishes to remain so. Remember rule number one if you can't keep your trousers up and are seeking for a public bathroom (when you've got to go, you've got to go). Never, ever forget to flush when you've finished. In Singapore, there is a $150 fine for not flushing after using a public toilet, and failure to pay the fee results in incarceration.