Katy perry was talking about how you should avoid, as an example of how to manage a relationship, sending an angry text at 2 am to your significant other.
In general the point she was trying to make is that it’s better to take the time to think about it than to do something in the moment that you’ll later regret.
There were also song lyrics in the article related to what she was talking about.
Read more: Katy Perry Really Doesn’t Want You To Send That 2 A.M. Text To Your Ex