Who are you supposed to sing 'Happy Birthday' to when washing your hands?

9:29am PST - March 6th, 2020    john krasinski - Mashable

This morning I sang "Happy Birthday to You" to myself in the bathroom even though it isn't my birthday. It felt wrong. I was washing my hands, as I've done approximately 50 times over the past two days, because I've now joined the masses of paranoid people wo…