I thought I was alone on that one, I have a pair of strappy, heeled shoes, and the toes of my
tights were always seeming to get laddered. I though it was when I sat down and crossed my feet, my right heel was catching my left foot, then realised the thin straps over my toes were cutting through. I have a slight instep when I walk, with my left foot, and also thought it was the way I was walking that did it