pkpk was crying last night and now her eyes are swelled up.  Tears are strange; you cry when you're happy and when you're sad.  This discussion of tears reveals a terrifying plot!
That's why it's called an OniOn.
Por eso en inglés se llama OniOn.
Por eso en inglés se llama OniOn.
Sim, por isso se
 chama de OniOn.