Things I don't understand

Everyone knows that when we move to a different country, specially one that is very different from our own, we can experience some culture shock, and there will be some things that we will find hard to understand. Let me state some of them here.

Size of the coins/bills The 10 cents coin (dime coin) is smaller than the 5 cents coin. That makes counting change a difficult task. Most countries follow the rule that, the bigger the coins, the bigger their value. Well not here...
The same applies for bills. I am used to bills with different sizes and different colors. The bigger the size of the bill, the bigger its value. Well, not here... Here the 1 dollar bill has the same size and shape as the 20 dollar bill, or as the 100 dollar bill.
Although the picture is not very sharp, you can see here the 5 cents coin on the left, and the 10 cents coin on the right. The 5 cents bigger than the 10 cents.




Paying to receive phone calls
When you receive a phone call on your cell phone, you also pay! The caller pays, and the receiver pays.
Even when you receive text messages, you also pay. When you receive a phone call, you can always reject it if you don't want to pay. But with text messages, there is no choice!
I have a friend that has told me that when you receive international phone calls and do not pick-up you also pay, because the roaming service was already activated. I haven't confirmed this yet.

Date format
I am used to write the date in the following format: day/month/year. It has logic, because it goes from the most specific and changing (day) to the the broadest and permanent (year).
Here the format is: month/day/year .... what a mess ...

Bathrooms
Public bathrooms (in restaurants, schools, etc) here have no privacy in the individual toilets. Whenever I go to a bathroom, the doors of the individual toilets have so much space in every side that you can actually see whoever is inside, and whatever that person is doing.