I just realized that I can't yell. It's either a physical defect, or an extremely internalized psychological restraint. I'm thinking the latter is more plausible.
I was just thinking about these things me and my brothers would do. We use to record these sound clips, that were kind of like comedy routines (and I think some were pretty funny, if I do say so myself). Sometimes we'd also just break into character and start having dialogues with each other (even when other people were around ). both of these sorts of "acting" sometimes required yelling... But I always did this sort of fake, breathy, low volume non-yell, which I didn't consider much until my INTJ brother specifically referred to it, and identified it as something purely my own. He wondered why I wouldn't do the real thing.
Ruminating on that, it occured to me that I cannot project my voice when singing. Whenever I sing a part of a song that requires vocal chords to be clenched up like when yelling, I do something breathy and low volume again...
And finally, it occured to me that I cannot recall yelling in a fight! I maintain my composure pretty well, so I don't get that emotive very often anyhow. But when I do express anger, I don't yell my words, rather I do something kind of hard to describe. I spit out my words. I throw them. They're like knives or darts or something. But it's always a quiet or normal volume, and I don't even tighten my throat like when (trying) to yell.
So... With no one in the house to disturb, I thought I could try yelling. But I can't get myself to do it! I'm seriously convinced that if someone offered me $500 dollars to yell, I'd miss 500 bucks.
I guess this probably seems really random... But I just thought it was so freaking weird that I can't yell that I would tell everyone about it. Especially since I didn't even think about it until now. How did I miss that?