This is cool, am I right though??

[Godzilla78]

cool topic. I like this discussion of subtle behaviors. I would suspect it is something akin to getting the rodent scent on themselves, as olfactory camouflage, and also as another poster stated, "camping out " in the rat's lair... waiting to spring death and brimstone upon the other family member rodents when they come "home". {laughs evilly}