K-pop stars are also people just like everybody else. They do things the same as we do.
They are just more refined when it comes to appearng in public since they have lots of followers.
However, what if there comes a time when your idols have been caught to do one of the nastiest things like farting? Read more here:
https://www.kpopstarz.com/articles/78075/20140207/whats-that-smell-k-pop-stars-farting.htm