Is this the weirdest sports injury ever

One for the men this. I had a long session in the pool last night, an hour and a quarter in total. I began to notice that as I moved my head to one side to breathe I brushed the front of my shoulder with my chin. Over time this friction took its toll and by the time I got out of the pool I had a red raw patch on my shoulder. How strange is that. I'll remember to have a shave before I go to the pool next time.

Kees -- is he injured too?