Oh, I think it's common....I just think there are a lot of people who were never taught to have common sense & thus never developed it themselves....but then there are some who's minds just DON'T work that way but think in reality they are in the minority. I was married to one of the latter but I had no idea there was a reason so I had NO PATIENCE. Figured he had a high IQ that he bragged about then I should expect a reasonable level of intelligence which I equated to common sense.....I was miserably disappointed. Had no idea what that high IQ he bragged about REALLY MEANT....it meant that there were only a few things that he could to that were only related to that high IQ.....high IQ isn't across the board that's for sure.

HOnestly I would rather have a lower IQ & high common sense to get along in this world in ways even these questions don't get into.