trip to mexico

Last night while i was looking at pictures from when i went to Mexico for the summer i was thinking about how different it is from the United States. To begin with when i first got there my cousins invited me to go to a type of flee market with them while i was at the flee market i got a ton of stares from people. At one point my cousins had to use the restroom and asked me if i needed to use it i said yes so i went along with them. When i went into the bathroom there was a women standing near the door like some kind of a guard. I kept walking until she stopped me and told me i had to pay to go to the bathroom. I looked at my cousin and asked her "is she serious?" My cousin said yes so i payed and she gave me toilet paper. This is an example of culture shock because i was shocked that i had to pay to use the restroom and in exchange they would give me toilet paper. When we went to go eat at a restaurant i ordered tacos for myself and the waitress said, "oh no salsa for you right?" I answered yes i want salsa on my tacos. This is an example of Ethnocentrism because the waitress that took my order looked surprised when i said i wanted salsa because she thought since i was not from Mexico i didn't like salsa on my tacos.