Right or wrong ?

What exactly is right? Or in other words, what exactly is wrong? Kind of experience I had till now suggests that there is nothing right or there is nothing wrong. Its all too contextual. Situations always carry certain bias towards one side, be it right or wrong. Don't know for sure but we all are biased may be its too generalised conclusion. One can easily convince others about something as right or wrong with some justification or by hypnotizing or by some sinister means or by simply putting up facts in favor of prejudices one carries.

Do we really care about being right or wrong? May be we don't otherwise cigarette companies would have been closed long time back.