If you’re from the US, you likely tip. Not just any loose change, but a healthy 15%. You may even believe that 15% is mandatory and extra good service warrants a bit more.
Fact #1: Only in the US do we tip 15-20%.
Fact #2: Tipping is not expected in all countries. In fact, not in most countries.
Fact #3: In many Asian countries, tipping can be insulting.