Once upon a time, the test for maturity was defined as being able to listen to the entire William Tell Overture without once thinking of the Lone Ranger.
Here's a test that is even more successful in determining maturity. Kristel and I came across this mistake in a restaurant menu in Bandarban. If you can read the typo below without cracking a smile, congratulations. You are a serious, sober-minded and mature person. If, on the other hand, the misprint causes you to laugh and shoot water out of your nose, well, then you're like me.
How did you do?