Why always "skirt-flipping" fan-service's (mini-skirt blowing up.)? Sometimes in anime/manga, I see some scene's where the MC flip the skirt of the heroine, or even some random character with a cute face. I know there are many kind of fan-service's like groping breast, yuri scene's, etc. But why is it almost always skirt flipping ? Like it is the standard of fan-service. 

Is there story behind it? Where does this originate from?
I have made some research and this is what i got (and sorry about my grammar )

So it called Panchira (パンチラ) refers to a brief glimpse of a woman's underwear. 


  Panchira (パンチラ) refers to a brief glimpse of a woman's underwear. The
  term carries risqué connotations similar to the word 'upskirt' in
  English usage. The word is a portmanteau of "panty" (パンティー pantī) and
  chira, the Japanese sound symbolism representing a glance or
  glimpse. It differs from the more general term "upskirt" in that
  panchira specifies the presence of underpants (the absence of which
  would more accurately be described as ノーパン; nōpan).


Origins


  Traditionally, Japanese women did not wear underwear. On December 16,
  1932, there was a fire in the Tokyo Shirokiya department store. Legend
  has it that some of the female staff tried to use their kimonos to
  cover their privates as they climbed down ropes from the higher
  floors, and accidentally fell to their deaths. Japanese newspapers
  began agitating for women to start wearing 'drawers' (ズローズ zurōzu),
  but seemingly had little impact at the time. In a 1934 survey by a
  Fukuoka newspaper, 90% of the women surveyed were still not wearing
  'drawers' a year and a half after the fire.2
  
  As noted below, the development of panchira in Japanese popular
  culture has been analyzed by a number of American and Japanese
  writers. Many observers link the phenomenon to the Westernization of
  Japan following World War II.7 During the occupation, fashions,
  ideas, and media previously unavailable were accessed by the local
  population, leading to a slight relaxing of earlier taboos.
  Western-style clothing (including women's underwear) gained popularity
  in the post-war period, reinforced through numerous media outlets —
  magazines, newspapers, films, journals, and comics.
  
  At least one Japanese source traces the beginnings of panchira to the
  release of The Seven Year Itch in 1955.[8] The media coverage
  surrounding Marilyn Monroe's iconic scene fueled the emerging Japanese
  craze. According to architectural historian Shoichi Inoue, the
  practice of "scoring" a glimpse up young women's skirts became
  extremely popular around this period; "Magazines of the time have
  articles telling the best places where panties could be viewed".[9]
  Inoue also writes that actress Mitsuyo Asaka spurred the popularity of
  the word 'chirarizumu' (チラリズム 'the thrill of catching a brief glimpse
  of a women's nether regions') by parting her kimono to show off her
  legs in her stage shows in the late 1950s.[10]
  
  In 1969, the Japanese oil company Maruzen Sekiyū released a television
  commercial featuring Rosa Ogawa in a short mini-skirt that gets blown
  up by the wind with her forming her lips into an 'O' in surprise. This
  led to children imitating her line "Oh! Mōretsu" (Oh！モーレツ, too much,
  radical), and a fad for sukāto-mekuri (スカート捲り flipping up of a girl's
  skirt).[11] Ogawa subsequently appeared in a TV show Oh Sore Miyo (Oh!
  それ見よ, literally "look at that," but actually a pun on 'O Sole Mio,' a
  neapolitan song 'my sunshine') that again featured scenes of her
  mini-skirt blowing up.


Anime/Manga 

For anime/manga culture,  it's 'partially' answered from this question.

Where did the anime trope of Clothing Damage / Clothes being torn originate?

it was from this manga, Shameless School 

Wiki Explanation


  Harenchi Gakuen (ハレンチ学園, lit. "Shameless School") is a Japanese media
  franchise created by Go Nagai. Harenchi Gakuen was one of the manga
  serialized in the very first issue of Shueisha's manga magazine Weekly
  Shōnen Jump. The series was the first big success for Go Nagai. It is
  also considered as the first modern erotic manga, sometimes considered
  the first hentai manga, though Nagai never used explicit sexual
  situations in the original run of the manga.


And from the same wiki, it was written 


  By the late 1960s, panchira had
  spread to the mainstream comic industry, as fledgling manga artists
  such as Go Nagai began exploring sexual imagery in boys' comics
  (shōnen manga).[12] Adult manga magazines had existed since 1956 (e.g.
  Weekly Manga Times), but it is significant to note the introduction of
  sexual imagery into boys manga. Millegan argues that the ecchi genre
  of the 1970s rose to fill a void left by the decline of Osaka's
  lending library network:[13]


and i read an article about Shueisha’s Weekly Shonen Jump came under fire for running a busty spread on Yuragi-sō no Yūna-san (Yūna of Yuragi Manor). The illustration sparked conversations about ecchi works in a magazine that is largely seen as reading material for kids under 14 years of age.

Summary

From what i could tell, the originate of "skirt-flipping" is from short mini-skirt that gets blown up by the wind ). There is a book with titles, Perversion and Modern Japan: Psychoanalysis, Literature, Culture that explain about this topic, but i couldn't copy the reference's, since its licensed. You could read the book online Here



References


Perversion and Modern Japan: Psychoanalysis, Literature, Culture
Panchira (パンチラ)