I have cold cheeks (Nikola's logic)

It happened a few times this week that Nikola came out of her bedroom in the morning, and the first thing she does is look for something in the hallway. But what she told me was: "I have cold cheeks"... I could not understand why she would say that.
This, until yesterday night, when Jaye mentioned, while talking about a slightly different topic, that she explained to Nikola that her lips and cheeks hydra-stick "helped protect her cheeks from the cold". Suddenly all this made sense: pretending that her cheeks were cold, was the way Nikola had found as an excuse for playing with the stick!