https://www.vocabulary.com/dictionary/cocoon
A cocoon is a silky web spun around the larvae of many insects. Caterpillars emerge from their cocoons as beautiful butterflies.
The word cocoon can also refer to a form of self-protection for humans. For some people, their house is a cocoon, a cozy retreat from which they can escape the world. They cocoon themselves away for a whole weekend,
Thanks waysider for mentioning this notion. In the religious world, some have "retreats." In wayworld, we had "advances." Not that many got the connection with cocooning themselves away. These days I just see it as the contrarian nature of wayworld.