A guess?

I managed to catch Ocean's Thirteen today. While on the bus journey back, with music blasting into my ears from my Ipod Mini, I suddenly recalled a question my dad asked me some time back. This is what he asks: "why do you never speak up when you are angry or unhappy with something?" I could not answered his question at that time. Tonight, it dawn upon me that maybe I have always knew that by speaking up, I might get too emotional. Hence instead of allowing emotions to take control, suppressing them by not saying will be a much better option. However, this might just be an attempt trying to get to the answer to the above question. Maybe there are other reasons which I have yet stumbled upon.