It definitely sounds like he keeps mistaking your hand for dead food, for some reason. Maybe he's a quirky one, or maybe you have a unique scent that he picks up that reminds him of food lol!
The nuzzling behavior is what they do before they start to slowly bite down and ingest food, like Sallos said. Especially followed by the slow wrapping, which they do sometimes to make sure they got a nice hold on what they're swallowing.
+1 to rubbing hand sanitizer all over your arms and hands before handling from now on. That strong scent should keep him off.
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