我爱你来自口腔源于心脏
[wŏ ài nĭ lái zì kŏu qiāng yuán yú xīn zàng]
'I love you' comes from the mouth and stems from the heart.' A poetic way of saying this love starts from a genuine emotion deep inside (heart) and ultimately is declared openly (mouth), expressing a declaration of love grounded in sincerity and earnestness.