It's just a social convention that men don't wear skirts.

男人不穿裙子仅仅是一个社会习俗。

《柯林斯英汉双解大词典》

If I owned only walking shoes, I wouldn't be able to wear skirts or dresses.

如果我只有休闲鞋，我就不能穿短裙或是连衣裙。

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For daring women who didn't want to wear skirts back then, blousy bloomers symbolized freedom.

对当时不想穿着裙子的大胆女性来说，松垮的灯笼裤象征着自由。

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Another problem is that girls tend to wear skirts, and The Last Guardian features a lot of climbing.

FORBES: Team Ico's 'The Last Guardian' And The Illusion Of Half-Realism

Because all girls wear skirts.

FORBES: Team Ico's 'The Last Guardian' And The Illusion Of Half-Realism

Some schoolgirls also wear their skirts above the knee, and the more adventurous go one step further by dyeing their hair brownish-orange and flaunting such contraband as flashy jewelry or oversized V-neck sweaters.

CNN: A SOCK TO THE SYSTEM