Things come and go in fashion. Big hair from the 80’s, bell bottom jeans from the seventys–oh wait, those came back in style.
For today’s prompt think of a fad that doesn’t exist (for example, creating letters/numbers out of duct tape and wearing them on your face as personal brands). Have your main character get totally caught up in the fad. Show what happens with the people they have to interact with that haven’t heard about the fad.