Leaving home to visit another country can be confusing no matter where you're from or where you're going. Everyone does things a little differently and it's exciting to experience, but it's still confusing.
A new Reddit thread asked "non-Americans... what common American culture reference would you like to have explained." The answers are great. They're great because you've probably experienced the confusion of traveling somewhere else and doing a double take when you learn cactus is great on tacos or chips aren't really chips.
However, it's a little harder to see all the ways the things you do are confusing for others. For instance one of the top questions is, "Do people genuinely share a room at uni?" Quite often, the questions and responses spark a fun dialogue, explaining things like "making out."