That's one of the things I love so much about WTHI, I actually sit there and have a slight case of guilty consciousness whenever I have to pick one girl over the other.
Like before the beach house orgy (in my case, being a man-whore), when you have to choose to either spend time with Katie or meet up with Debbie or Lily.
Normally I'd go fuck it, doesn't matter, but in this case I chose what I felt was the option with the least possible hurt for any of the girls.
Because I care about the characters and that's great writing.