Whose bike is it anyway?

I read a story of a guy who complained to his friend that his car key doesn't work, even after he turned it upside down, jiggled it through the keyhole and forced it to turn. His friend finally knocked some sense into the guy when he showed him that he was actually trying to open the wrong car.

This reminded me of another story that happened my matriculation days. Back then most of us were pedestrians and public transportation users. My friend A was one of the few who had his own bike.

One day another friend, B, came to A asking to borrow his bike because he needed to go somewhere quite far. Without much hesitation, A handed B his key and asked B to be careful. It was morning.

In the afternoon, as A was coming back from lunch, he saw his bike exactly where he had parked it. A's mind began to wonder, did something happened to his bike that B had to borrow someone else's or take the bus instead?

Evening come, and A waited for B and an explaination. And not long after that B arrived and handed back A's bike key. A was surprised to see B acting as if nothing had happened. He however decided to keep calm and asked B nicely why he didn't take his bike.

I did, said B. A said earlier he saw his bike unmoved from the same place he parked it, at the corner of the parking lot.

That corner? I thought your bike is on the other side of the parking lot!

It turned out that B had mistakenly ridden all day long on someone else's bike that was coincidently startable with A's bike key.