grain-and-field wrote:
clue: It is considered rude to ask "why?" when you are asked a SIMPLE question. This goes for all human beings, both AS and NT.
However, if the question is more advanced, asking "why?", may not be so rude, but it is STILL considered somewhat rude.
Nobody likes to be asked "why?". There may be some cases where you would fancy being asked "why?". But as a rule, it is rude.
Instead, say "why do you wanna know?". That is polite, well, more polite.
Rude? Only if the person being asked is so egotistical and/or insecure that they become offended when what they say is not accepted as The Truth.
I think this myth of "Asking 'Why?' is rude" got started with the military, religionists, cultists, and multi-level marketers. In each of these cases, the leadership expects their orders to be followed and their "facts" to be believed without question, and questioning authority is Not A Good Thing if you want to be promoted in the Army, Catholicism, Scientology, or Amway.
A sure sign of an authoritarian mindset (a "Control Freak") is an arrogant, indignant or hostile reaction to the question "Why?".