I'm right handed, but to eat, always use a fork in my right hand, knife in my left. Living in the UK this makes me some kind of vulgar freak. I say "living in the UK" as I assume other countries don't expect every right handed person to eat using a fork in their left hand.
I've never understood this bizarre tradition. Let's teach everyone to use a fork in their left hand if they are right handed - what lunatic decided that was the right thing to do.