I don't have it, but I think various aversions to mirrors are not uncommon. There are various Greek names for it, but actually the situations seem quite individually varied, when I look online.
When I was teenaged I didn't like being photographed. I used to use tricks to avoid getting my student photograph done. I would quickly move from the waiting for photographing line to the already photographed line.
That was simple to explain, though. I looked pretty sloppy as a teen.