More Dumb "Logic"

I know a guy who thinks feeding all of the babies/kids with one spoon is good--because it makes their immune systems strong. His family is originally from S.E. Asia--which has a high occurrence of Hepatitis B incidents within the population. I've decided that the next time the issue comes up (and it will if I see him using one spoon to feed multiple kids), I'm going to tell him that he should lick the toilets in public restrooms--because certainly, that would be very good for strengthening his immune system.
Bottom-line: People from other countries might be able to tolerate less hygienic conditions than we can in the USA--but people generally don't live as long in those countries.