He grew a moustache because he wanted to have something in common with his favourite detective novelists. He grew a moustache because he wanted to change how he was seen without changing who he was.
"Oh no," his wife said when she came home from work. "At least trim it."
So he trimmed the parts of his moustache that curled under his top lip and tickled his teeth whenever he spoke. He trimmed the parts of his moustache that distinguished the moustache from all the other moustaches he'd ever grown. He trimmed the parts of his moustache he'd grown in hopes of looking like Paco Ignacio Taibo II, but had to finally admit made him look more like a man who didn't know what he was doing when it came to his own face.