People touch their faces all the time, mask or not. And some non-physical effects of masks may be useful. If nothing else, fumbling around with masks is repeate

People touch their faces all the time, mask or not. And some non-physical effects of masks may be useful. If nothing else, fumbling around with masks is repeated reminder for all other measures. It may feel silly to wear a mask if you belief that this is the only effect. But you cannot deny that it is a causal effect, e.g. it would not happen without wearing the masks.