You also see it a lot in the description or title of one of the many video clips on the Internet of a skateboarder, cyclist or gymnast for example, coming a cropper.
Tonyted - why do you come to that conclusion?
In fact, how do you know i wear any at all???? - A username does not necessarily indicate that a person utilises said article.....;oP lol
@ rojash - wot kind of reply is that??!!
@ BOO, joko & Steve - thanks for sensible replies!!