It's kinda weird and almost become universal, many of the screenplay writers and directors in Asian Pacific area, such as Taiwan, China, Japan, Korea, Thailand, Vietnam...seemed to never be able to grow out of their teenage syndrome and phobia of their young and immature romances and loves. The formulaic trend, if I tried to trace it back, most likely was from Japan, originally from their Manga, their anti-social young writers who never had the working experiences or social lives, stayed in their bedrooms, read animated Manga stories, then wrote about their own limited experience from their elementary school to their high school, retrospected their puppy loves to their classmates, boys or girls in their uniforms, timid, shy and reserved, didn't know how to express their love to their opposite gender.
Ho is just one of them, so typically unable to grow out of such remembrance of his teenage love loss and his inability to deal with those impotent situations again and again. It changed and narrowed his thinking, lifestyle and sexuality. His movies most were nostalgic to his teenage time, about the young and fruitless romances, the melancholy regrets, the failures of his romantic adventures in a tightly conservative society he grew up with. His and many other similar Taiwanese writers and directors are exactly like those Japanese and Korean counterparts, many of their products are about romances in uniforms and satchels, after-school encounters, or shyness during classes to each other. These kind of romances never lost their charm to their audiences in puberty, never failed in box office. But it narrowed and hurt their advances in literature and movie production since they couldn't and even refused to grow out it.
It's time for you guys to grow up, not just to grow out of it!