Does it make sense for a father to keep pictures of his grown daughters in his personal collection box?

My mom has been absent a lot due to her sickness. She has been in/out of the hospital and sometime has to stay nights and weeks at the hospital. While cleaning my parent house I found my dad personal box with pics of me and sisters in it and they are recent pics.

Does it make sense for a father to keep pictures of his grown daughters in his personal collection box?
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