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!
And it doesn't happen when 
you're cutting green onions,
Y no pasa cuando cortas cebolletas,
Pero no pasa al cortar cebolletas,
Quando você corta cebolinhas,