Grocery shopping has proven to be a challenge on multiple occasions. Today was one of them. I went with Tim to pick up a few things, one of which was milk for cereal. We knew the word for milk: mælk. Pretty easy to figure out. But it's all the prefixes that are confusing. We picked one up that said "Kærnemælk" on it, figured it had to just be normal milk, and didn't think much more of it. We walked back to Tim's apartment, sat down in the common room with some of his friends, and he went to pour himself a bowl of cereal. The "milk" was really thick. We checked the date. It was fine. Then we thought maybe it was cream or half-and-half. Not quite. His friend used Google Translate and discovered that we had, in fact, bought buttermilk. That does not go well with cereal, let's just say. Clearly we need to do a little more research before grocery shopping. Lesson learned.