In order to have people wash their hands for 20 seconds, do they really need to be given a song to sing (ie, "happy birthday", which, like any other option, can be sung too fast or two slow...) instead of being smart enough to know how to count to 20 to begin with?
It bothers me to no end that a population that can drive and vote also make decisions based on 2000 year old stories, alarmist headlines without critical thinking, that they consider toilet paper a necessity to survival, and need a song to help them count to 20.
True fact: The chorus for REM's "It's the of the world as we know it" runs exactly 20 seconds. Coincidence? I checked, it's true. With and without the tinfoil hat.