There’s always a reason why someone becomes a hoarder. For some people, it has to do with a particularly traumatic upbringing. Others may have extreme difficulty making decisions about what to throw out, or what to keep. Some people find security in owning every single thing they might possibly need someday.

Then there’s this guy. He was supposed to share an inherited New York City brownstone with his brother. Instead, he holed up in the $10 million home and spent the last seven years filling it with….well, with everything. This worked for a long time, but now his brother is taking him to court.

When someone lives with so much accumulated clutter, there’s always a reason for it. Some reasons, however, are more obvious than others.