Don't get me wrong, I know that it is extremely important to wash your hands to refrain from getting sick, but it's like that saying about how you're supposed to brush your teeth after every meal, it seems a little germophobic to me. (No I'm not saying anything bad against germaphobes, I'm just trying to make a point.)
https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/hand-washing/art-20046253
https://www.mayoclinic.org/healthy-lifestyle/adult-health/in-depth/hand-washing/art-20046253