A lesson to everyone (especially males, somehow most females seem to know this innately.)

Hypothetical situation: You and your friend are talking, joking, having a good ole time when suddenly your friend says, "Hey! Now I'm mad at you!" You are baffled. What have you done wrong? You ask, "Why, what happened? Why are you mad?" Your friend explains to you how you have offended him/but-usually-her. This explanation makes no sense at all to you. What do you do?

A.  Say, "Are you crazy? I don't know what you're talking about! Get over it!"
B.  Squint your eyes, focus on her and secretly hope that your much longed for laser eyes will    suddenly kick in and crisp her.
C.  Say, "I'm sorry I offended you, I didn't know what I did/said would upset you, I'll try not to do it again."
D.  Leave, hoping that when you've come back the alternate personality living in your friend's head will have gone by the time you come back.

The answer is C always C!! So what if you don't understand exactly what you did wrong?! You are apologizing for the perceived wrong! Most likely you will not be able to convince your friend that you honestly don't understand how what you've done is offensive. Apologize for (even unknowingly) causing the offended feeling. That way she won't be even more upset with you for being so rude as to not care weather or not she's upset.