I chuckled to myself as I approached the till, after waiting in line for a while.

“I’m laughing at myself” I explained to the woman sat behind it, “because you can’t see me smiling at you.“

I’d forgotten that I was, of course, wearing a face covering.

“No.” she replied.

“Well I am smiling at you.“

She laughed back at me.

Sometimes, it really helps to spell it out.