A left and right issue

A member of staff reported the following to me…”I stopped a Year 7 boy in trainers at break time and asked him where his shoes were. He pointed out that he had PE yesterday P6 and when he got home he found that he had two left shoes. He had brought the shoes in and was going to go to PE to sort the issue out.”
Literally thirty seconds later I stopped a boy who was hobbling and also wearing trainers. “What’s the problem?” I enquired. “ I had PE yesterday” he said. “I put my shoes on and came to school this morning – it was agony” he added “ I discovered I was wearing two right shoes”, “ I had to take them off because it was so painful, so I had to put my trainers on”.
I gently led him to the other boy in the playground. “ I think you two need to talk” said I.”