So do you use your right or left thumb to press down the spacebar?

I'm trying to notice which one I use while writing this, and its really hard to type while focusing on which thumb is the dominate one. I'm alternating, but for the most part its the right one. I think it depends on what the last letter of the word is... what hand is being used. Weird to think about while typing. Making it hard to type. Whoas. @_@

Anyways, I took a typing class in high school, though I can tell you that I dont really use half the rules we were taught. I only use my pinkies for the 'A' button and ' ' ' button... that looked weird. lol. Don't know my wpm abilities at this point. I'm ironically a lot slower if I have something to look at and type.

Jam it back in, in the dark.