Mostly common sense. If you need to be told this stuff that in itself is a worry. Applies outside the U.S. too.
http://takimag.com/article/the_12_step_plan_to_restore_american_machismo
I'll disagree that you need to wear a three piece suit in order to wear a decent hat, and bicycle helmets are not entirely stupid. Otherwise, this indeed should be obvious to any child and not be need to be stated to an adult.
The reference to Randy "Macho Man" Savage is untimely seeing as he passed today. Good night, sweet prince.