I think your girlfriend can handle the snake marking her territory more than she could handle you doing it...lol. Perhaps Ivy was jealous of the "other woman".... Interesting thing has been happening...we were talking about your snake...I like the name Ivy, btw...liking the temps cool, and I mentioned how Hermes, my albino checkered, always likes it warm. Now all of the sudden he wants to be on the cool side of the tank, in the dark, all the time. I have no idea why the sudden change in preference.