Good question.
But perhaps for the time being, for the safety of your loved ones and mine, this from the CDC:
While research indicates masks may help those who are infected from spreading the infection..."
Your call.
[One often sees unmasked folks in a store that "requires" masks, and I have pondered over a tee shirt that says:
"I am not wearing this mask for my protection, asshole, its for your protection."
- but I live in a polite neighborhood. {;^) ]
Should say, look at all my virtue signaling indicated by my face diaper.
Virtue signal much? What other acts of benevolence do you engage in that is of no benefit to you but only to protect others?
Im curious to know where you get the defective one-way masks. What happens if you accidentally put it on backwards?
If it makes you feel better, I hereby relieve you of your duty to protect me. You can remove the mask now.