Laughing at 4GS and imagining what others might think of him whilst he is humming away for six verses!!
I can't imagine ever using a loo and not washing hands afterwards, even at home. However, how often is it possible to wash hands after coughing or sneezing when you are out and about. I always wash my hands however before cooking or eating and can always remember as a child that washing hands before eating was routine and not questioned.
I don't wash my hands after petting any of my animals unless I am going to handle food. I would be washing my hands all day long!
Mind you, I don't believe in all this spraying with antibacterials, etc. We need to build up immunity. Basic old fashioned hygiene rules, 'yes' - over the top caution, definitely 'no'