Why do some people lack common sense?

Re: Why do some people lack common sense?

Sometimes we the things that seem very obvious to us rnt so simple for others. Its just the way we look at it. For some Physics in common sense for others waste good amount of time just getting Passing grades. Bring this to lower level and you see people doing wiered stuff in general e.g example of your uncle.

My friend moved from Pak to USA, He used other friends cell phone to call Pakistan directly from cell phone. To most of us living in usa its not normal but understanding calling system in Pak i think it wasnt his fault.