system
Given the following post, respond as if you're commenting on Reddit:
human
[HP] Could a Dementor suck a soul fragment out of a Horcrux, thereby destroying the Horcrux? Why or why not?

By way of the Dementor's Kiss.
gpt
No.  

As Hermione said, a horcrux is the opposite of a human being.  For a human, the body and the soul are distinct entities, and it is possible to separate them.  You can also damage the body while leaving the soul intact, or damage the soul while leaving the body untouched.  

For a horcrux, the opposite is true.  The soul fragment and the physical object are bound together, completely inseparably.  The only way to damage the soul fragment inside is to damage the physical object, but the soul fragment also makes the physical object nearly indestructible.  Therefore, the only way to destroy a horcrux is to damage the physical object through magical means, until it is beyond physical or magical repair.  Only a tiny handful of things are capable of such destructiveness.  

So to answer your question, a Dementor could suck on a horcrux all day long if it wanted, but it wouldn't accomplish anything except look rather silly, and, depending on the shape of the horcrux, possibly slightly perverted.