By using 'because' continuously three times, can you make an English statement ?

Why Aeroplane windows are round?

When it's bad luck to meet a black cat?

Can it be possible to build a house that has all its four walls facing towards the South?

What will you call your mother's brother's brother-in-law?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

A lion and its tamer are standing inside a cage that measures 1 unit in radius. Both of them can effortlessly run at the speed of 1 unit maximum.

1) Suppose the lion is hungry, will he be able to eat up the tamer?
2) If yes, how long can the tamer survive?

what does this picture(rebus) riddle means ?

What is the next number in this matchsticks series riddle?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?