I myself never got the point of adding in a characters sexuality for a CS unless it was something that would obviously come up in the story. Like and even then it normall had no need to be there, for example a character being married to the opposite or same sex. You can kinda get the idea from there alone. And if it gets to the point where you feel as if it's an important part of your character, I'm all for it, but forcing it into a CS always felt weird to me.