Why looking at Sonia will make me laugh? Why just by looking at Sonia will make me laugh??

Whenever i look at Sonia i will 情不自禁 de start laughing .. Even if she just turn back to ask question. Even if she nvr speak. I will just laugh lor..! Somemore is that type of really laugh de. that type that will laugh till stomach pain de.. not fake de lor. Her looking so funny mehx?? Not at all lehx.. I just dunno why i laugh when whenever i saw her.! && she say she laugh whenever she saw me.. really..?. Why we two will laugh when we saw each other.  ¶ 4:41 PM