Is it normal for ex’s to keep photos of you?

My ex still has photos of me on his phone. We really didn’t date for a long time. But I’m not sure how to feel about it. To me, it seems kind of weird or is it normal? I never kept any pictures of him on my phone. But he recently he texted me and we had a brief conversation. But in that conversation he brought up an old picture of me and said I was beautiful. I guess I didn’t think he would keep my pictures. (It was just a normal picture)
Is it normal for ex’s to keep photos of you?
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