I can exist without carrying things. Practically, if I'm walking around a city, I probably want to have ID and some way of paying for things (and to get back in

I can exist without carrying things. Practically, if I'm walking around a city, I probably want to have ID and some way of paying for things (and to get back into my home which is presumably locked). If I just take a stroll on the river path from my house I often don't carry anything but mostly I do.