Why are we teaching him to read?

I was working on the computer and Justin came in and was looking over my shoulder. He started talking and I wasn't paying too much attention until my ear caught the word sex. So then I start listening and he is chanting "Sex, sex, sex", over and over. So like a good parent who doesn't want others to wonder what on earth that woman is teaching her children I corrected him. "You mean six" "No I don't." Yes you do." No look mom", pointing to the place on the computer where it tells me how many secs are left on the timer.
I stand corrected.