They just want a little private time with their masks.

No one could even come up with a good mask to put over it.

In the light of the study, this man was a being with a human mask.

Send the ones with masks down, one at a time.

But the person who ran from that room had his face covered with a mask.

Then three people came into the room, all dressed up in white, with masks on.

"When we went out everyone was in the street walking between men with black masks and big weapons."

Even with his mask on it could be seen that he was angry.

Each of those characters, in turn, is associated with a mask.

He was more acceptable with a mask over the lower half of his face.