I was going to write a post called what I have learned from swimming in the sea in winter. Ten short points, nothing particularly original, a bit about endorphins, a bit about doing the thing you think is impossible and possibly a mention of brown fat. Then I saw John O'Farrell’s tweet (gently) mocking ‘yet another’ cold water swimming piece in yesterday’s Guardian, plus a string of like minded comments. So I didn't. I'd write about shame instead; referencing Brené Brown, wondering what shame does to us, how it differs [...]