Oh, Horrid Mis-Insertion!
I mentioned that I'd had some trouble getting the Shure SE310 in-ear headphones to fit comfortably, and I wanted to experiment with different nozzle sleeves. Removing the sleeves from the SE310s took more effort than I'd imagined. Not that it was <i>difficult</i> like it can be difficult to carry a 50-lb amp up three flights of stairs, but more that it was <i>tricky</i> like it can be tricky to cajole speaker cable from a tight grip in a small space. I suppose it's a good thing that the sleeves hug their nozzles with such dedication. You wouldn't want them slipping off in your ear.