It's the sand. It was always The Sand.
It put him up to this. The Sand is abusing him, being coarse and getting everywhere.
You can hear the fear in his voice when he admits this to Amidala, stating:
[quote]I don't like Sand[/quote]
He's admitting the violent relationship The Sand had pushed him into, the abuse The Sand forces onto him.
And Amidala does nothing.
English
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One of ours, out of the main hold!