1.) FASHION???
Allies Powers:

England: I absolutely adore my country and it's (wonderful) fashion similar to (horrible) France's.

France: Kudos, Kudos. (Except your style is more horrible than mine AND I'm more updated than you are.)

England: (Excuse you! At least people searches MY clothings and style specifically in the 15's to 19's than yours!)

France: ... You do know that my country inherit the title 'Country Of Modern Fashion' .

England: ... but despite that, we wear our clothing, nonetheless.

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America: My sense of fashion is unique, and it's 100% American! I WON'T CONSIDER MYSELF AMERICAN IF I DON'T WEAR IT! :D

England: *cough* *cough*

America: of course I inherit some or his frilly fashions, but I'm pretty sure that my fashion line is 100% American!

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Russia: ... Showy clothes?

America: HAHAHAHAHAHA, seriously, what is?

Russia: ... I live near to the north pole.

America: ....

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Axis Powers:

Germany: ... jumpers wearing adults. That is all..

Prussia: IM TOO AWESOME TO EVEN DESCRIBE HOW AWESOME I AM WEARING MY AWESOME CLOTHES!

Italy: *walks in with branded clothes*

Germanyand Prussia: ...

Romano: *walks in smugly*

Germany and Prussia: ...

Spain: Ole~ *is wearing a boxer*

Romano: OH FVCK NO SPAIN.

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Mostly Everyones perceptives:

Everyone: We like our traditional clothes.
And we honestly hate modern fashion because the tendency of it, is that: the next generations will forget about the uniqueness of the styles of their styles and will accostumed to be wearing half decent clothes and America or foreign branded clothings...

America: HELL YEAH :D *plays The American Anthem*

Everyone: =_=

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An honest style of the country(ies) with the most weirdest and hideous fashion trends.

America: Mom Jeans (The jeans that is waist high and makes the buttocks look more long and flatter)

Underwear as Outer wear (an inspiration of Superman, Batman and some DC heroes with underwear in their suits)

Bullet Bras (Madonna wear them first, Then Lady Gaga, Katy Perry, Miley Cyrus etc. Can't disagree they are hella cool at the same time, cringe worthy)

Netherlands: Extraocular Implants (You know when some fanfiction says your eyes are shining like jewels? In this case, it's consider as a metaphor. But actually it's a thing. You need to pay $1000 just to implant a jewel (either fake or not) in your freaking eye. Try searching it up)

Japan: Animal Hair Hat (ah, Japan... the weirdest and most admired country ever. Technically the birthplace of weird. And this trend actually started with The J-popper Nagi Noda... And lady Gaga make it a thing)

China: Faceskini (You don't want to get tan under the sun? This is your answer, it will cover everything except leave a hole in your eyes, nose and mouth. You look like an alien wearing this. A great company with a two piece) (you will look like a burglar too)

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2.) SECRET

I'll sum this up.

Asians (who have been Conquered by China): Actually, China is the reason why Asian cuisine is great, we actually renovate some of them to make it a tad bit original, but all credit will be given to China.

China: *opens mouth to speak*

Japan: *throws a book at China's face* you don't want to l(r)isten to a story 5 days long.

China: IT'S NOT THAT LONG! IT'S A STORY ABOUT MOTHER ASIA--

Japan: L(R)ONG ASS STORY.

China: -TELLING ME THAT WEST AND EAST EUROPE PAIR INGREDIENTS WITH THE SAME FLAVOR COMPOUNDS AND WHILE WE ASIANS, NEED TO AVOID THE SAME FLAVOR COMPOUNDS. BECAUSE 2 FLAVORS IS BETTER THAN ONE.

Japan: ... THAT'S THE SUMMAR(L)IZATION OF EVERYTHING AND THE HARDSHIPS!!

China: *media*

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3.) detailed theory explanation

France: ...

England: ...

France: technically, we countries don't have any BIOLOGICAL parents to begin with - we are born into this world to be a personification of the land we are referring to, and until that land exist, we coexist.

England: it's a bit like magic, In a close way to refer it. We are either born by a superstitious force from both land and beliefs of the people living in us.

France: We don't actually see our humans at growth or development to adapt our environment, (as if, we are like souls being formed, and so are they) but conciousness of reality will overpower us... really

But Countries do act as a a parent not because they have to, but they need to. We live in a cycle, and that cycle continue to go round and round -

Sealand: like a merry go round~

England: AND THAT THE Continents that have stood as our parents and some acient countries existance have been depleted, is because the land and beliefs have reach on their limit, and their facilities and such will be passed to their descendants.

France: Of course, if Continents still exist, we, the countries, wont. It's like we would be like parasites to them, and that, they won't handle the pressure of being in existence that their land will sunk back at the sea.

England: it's actually the reason why we countries came to existence - the growing population of human and changes have been a huge burden to them, that's one reason why East and West Europe have been separated. Why some of Asia's land sunk, and why Antarctica ceased to exist.

It's their right to give birth to us (they are... 'Special' per say) and not by physical or biological way of giving birth... it's a bit more superstitious.

France: We don't consider East and West Europe as our parents, more like 'we' are 'them' in many ways.

England: I hope you're satisfied with that explanation.