I never use my left hands when I'm eating, I feel unconfortable to use my left hands, because I use it to clean up after..[you know] how to say it instead of "poop". :-)
You can say "I use it to clean up after I go to the toilet."
In my culture, people usually use both hands to eat, holding a fork in the left hand and a knife in the right hand. However I hold my cutlery the opposite way.
We don't have a specific hand that we use after going to the toilet. I think everyone uses whichever hand they are most comfortable with.
As long as we wash our hands with soap very thoroughly after going to the toilet, hopefully it is then safe to touch food with our hands.
I'm sorry I mean uncomfortable.