The Utterances of a Peculiar Mindset

Arey chhod na yar.. Ek pen ki hi to baat hai..

This dialogue sound similar? Surely.. Someone has taken your pen to sign some document or to scribble a couple of lines on some paper and then forgot to return you. Two days later, you are asking for the pen. The friend says this dialogue. And you are like willing to kill him..
Now let's take it other way. Place yourself at the place of that friend. You took someone's pen and forgot to return. Then two days later he asks you for pen. Meanwhile in the two days, you have misplaced the pen somewhere. You are sure to utter the same dialogue.

That's a common human psychology. When we are thinking about something, we think as a very small thing when its about someone else. Whereas, we take it as some huge problem when it comes to ourselves. Its not just about pen but about everything. For the sake of some name, let's call it as "Pen Theory". So do you find any more such examples?