has your Crestie ever...

[Bogertophis]

It was really strange it was only directed at me anybody else could approach him with no problem
And I raised him from a tiny baby
My reptile vet at the time said that he viewed me as another iguana in his territory

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I've heard another explanation, that it's a response to their human's pheromones at that time of the month- it gets them riled up. I dunno?

That was the explanation given about a large male iguana that was shown at a reptile expo I attended years back...he was re-homed to the
herp. society members that had him there (on leash) to educate potential owners about iguana issues.