I have a whole suitcase full of old letters from the 1940s onwards! Something like 300 letters. I have started going through them with the object of destroying all but a few interesting ones. Many of them I've scanned or taken notes from because they contain very interesting family information. However, these are not love letters, and the sender and recipient of them was either me or my parents, also a great aunt sent quite a few. No-one stated their wishes on what to do with these letters, they were all left to me. So I have no guilt reading them or scanning those which are not too personal.
If either of my parents had specifically asked me to destroy them without reading them then that is what I would have done. Instead, I have a whole world of family history for the taking!
Love letters are very personal and I can understand people not wanting to share them, although my parents were very open about the past and willing to share anyway. I don't know whether they would have objected to the reading of love letters, but in any case that question has not arisen.
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