When someone who is wearing one mask asks you to also put on a mask, ask them:

“Why, are two masks are more effective than one mask?”

When they say yes, tell them to wear two masks.

If they are wearing two masks, ask them if three masks are more effective?

Again, if they say yes, ask them to wear three masks.

When someone who is wearing one mask asks you to also put on a mask, ask them:

“Why, are two masks are more effective than one mask?”

When they say yes, tell them to wear two masks.

If they are wearing two masks, ask them if three masks are more effective?

Again, if they say yes ask them to wear three masks.