It started with Lauren Hall-Lew (an American in Edinburgh) reporting on her daughter’s query about BrE and AmE on head band. Commenters brought in hair band, hair bobble, and scrunchie, and I mentioned sweatbands for sports use, which come as wrist bands and head bands.
I was eventually led to websites selling not just sweatbands, but rainbow sweatbands, and that led me to some more rainbow sportswear, in particular tube socks. So it turned into a gay rainbow day. (There’s a firm called, wonderfully, Pride Socks.)