Why are some people avoiding mirrors when tripping?

I love looking at myself in the mirror on acid, only time I fully like my appearance. My first trip also fixed a lot of my insecurities. My Girlfriend on the other hand gets really scared and really doesn’t like what she she sees at all. Any people that are/were the same? Can you explain why? I feel like looking in the mirror on LSD is something very important and I wished I could help her not be scared about it.