为什么单膝跪是求婚因为双膝跪是上坟啊
[wéi shén me dān xī guì shì qiú hūn yīn wéi shuāng xī guì shì shàng fén a]
Why on earth is kneeling down on one knee associated with marriage proposals and kneeling down on both knees with funerals? It humorously contrasts the solemnness of significant events.