*Raises hand too*
Poly, you are my hero!
Seriously, I understand the slipping up and correcting people's grammar out loud. I've actually done that myself. I generally blame it on the fact that it's force of habit from homeschooling.
I had a teacher, when I was in cosmetology school mind you, who, if you asked her something using "Can I...?" she would reply, "I don't know, can you?" repeatedly until you said "May I...?" I do that to my children now.