Where has all the common sense gone to?

I cannot for my life figure out where the common sense in this world has gone. Young'uns nowadays do not own even a teaspoon of common sense, and do the most unlogical things you could ever think of. How can such school smart kids not be so unlogical in so many ways.... it beats the heck out of me....you spend all this time and money on studying but when it comes to general knowledge and common sense they don't own an ounce of it!!! AMAZING I would say! How are these kids going to survive the real world? Let alone grow up and make families?