These sound like they should be the LAST 2 people in your life that you should have to yell at. Altho im not sure why anybody has to yell at anybody else, except to get out of the way a bus is coming at you. Arent these the 2 people you talk to most?

Being open about your feelings doesnt mean you have to aggressively express them. Or if somebody is tickling you or otherwise is putting hands on you, then yeah yell. Maybe they are signaling that the amplitude of the emotion you are expressing doesnt fit the situation as they see it, like, "why are you yelling about this, just ASK." But sometimes when people say that, the yeller gets madder.

I think its like when couples fight about money - its not about the money. Similarly, the yelling is emotion about something else, not the current subject.