pink poodle
気が狂っている男
You ever watched someone plate up meals to be sent to table?Surely it isn't too hard to use a spoon rather than washing your fingernails in someone's beverage. I've never worked in the food industry but I would imagine preparing food before it is cooked is a bit different, as heat would kill off most of the germs.
As for your specific magic tea moment, if it was me making it...I wouldn't be putting my hands in there, that why spoons or tongs or strainers and many other tools were invented. Even it I was making the item for myself, because customers see.