Even with a mask, surface spreading would be effective. One of the arguments against masks, aside from the fact that they are useless for airborne viruses, is that people touch their faces all the time when they’re adjusting the masks and thus transfer any contact virus practically on top of heir nose, mouth, eyes, etc.
Without one I rarely touch my face which is why I never catch anything.
With one I am perpetually pawing and clawing at it.
I’m sure this is helpful to me.
:-P