There’s something about cold plunges. My group started when some of us started meeting for drinks and a swim after work during the summer, and we just kept doing it every week through the winter. Some joined the group during the winter. Those people became my closest friends:

- We see each other every week, almost without fail

- I suspect the invitation to a cold plunge pre-selects for people with very high openness, and those people aren’t afraid of deep friendships

- Doing something hard and a little bit scary together strengthens the bond