Beauty and ugliness are matters of subjective judgment, but Yen Sheng-hung has something to say about this: in his "objective" opinion, there are so many moth species that at least in terms of their colors and patterns they are more diverse, and there are many arrangements of markings which do not occur on butterflies.
美、醜牽涉主觀認知，但顏聖紘有話要說，他「客觀」的評比：蛾類數量太多了，至少顏色、花紋樣式就比較豐富，許多圖案的排列組合，是蝴蝶身上不曾出現的。