Pet peeve time

I have a peculiar pet peeve and that's with the bottles and cans you buy soda or water in at the store,out of a machine-whatever.People think I am squirrelly but if I must drink from a can,I wash the top of it vigorously.Why?Think about it!It went from a bottling plant to a warehouse to a store-who knows what could have been crawling all over them?My Dad always did that and its a habit-do any of y'all go "Monk" when you open a drink?LOL