My prediction is that Johnny is one of those people who likes to climb into bed fresh from a shower, and Bao would just as soon wait to shower in the morning, or something like that. Nothing about how Bao has been presented to us supports the idea that she doesn't have a regular hygiene routine.
Also, she did a really bad and convoluted job of saying "I am very self-conscious about my snoring and you are making me feel uncomfortable when you keep bringing it up," and he did a very bad job of saying "I'm so sorry, I will stop teasing you about it now that I know it is bothering you."
