Four years ago I made a contemptuous comment on Twitter about a dude in a speedo. It was hi-lar-ious. I envisioned thousands of favourites and retweets and "OMG YES!" replies. And all the speedo-wearing die-hards would obviously read my tweet and be converted to the side of something more sensible and loose-fitting. I was a Twitter hero. And then a friend of mine replied, "Body shame sucks." Seventeen characters to wake me up. I felt small. I had acted small.