To be honest, I can't remember. Probably as far back as when I was still in counselling. I am often angry and upset enough to cry but I have always forced it down. It is a bit like how I stifle a yawn except very rarely by taking a deep breath. I have no idea why unless it is a mental block from past bullying and abuse about being a crybaby (yawning makes my eyes water and it looks like I am crying) a bit like how I have a block on vomiting because mum used to slap me for throwing up.
Anyway, I tend to write out my feelings these days rather than actually crying or yelling. Makes for a much quieter life all around.
The question I answered here, in case they change it (which they have done before), was, "When was the last time you cried?"