Portrait without a face

As part of my MA, I'm planning to run some photography workshops with a couple of groups of people. I'm preparing some materials to use as part of a zoom session early next month with one of these groups.  One of the things I want to talk about is anonymity.

As we're in lockdown the only person I could use as a model was J, and the gloomy weather today meant that I'm not sure it's got light so we were stuck indoors too!