One aspect of why any sort of mask is encouraged is that it helps prevent the unconscious face touching. I scratch at the side of my chin/beard when i'm thinking. With the mask on i sense it's present and causes me to stop the urge.
I touch my face way less with one and think about it each time i do. yes i rearrange the mask sometimes, but then i go wash my hands.. and as i wear a mask more, my need to rearrange it drops.
it also is a social cue for anyone around me to think about the hygiene issues if they see me touch the mask which they don't get when i am not wearing a mask.
The mask covers up your primary facial mucous membranes. (nose & mouth, but not eyes)
The virus will not go through your hands or face. Wear a mask, avoid touching your eyes (wear glasses?) and you're most of the way there. Keep washing your hands anyway though.
