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!
When you're happy, they smell like citrus.
Si estás feliz huelen a cítricos.
Si estás feliz huelen a cítricos.
Quando você estivesse feliz,
 elas teriam um aroma cítrico.