I cannot find anything that calls this sort of behavior a disorder. My first thought was personification, as in literature - usually used in metaphors. But I remember, somewhere in the back of my mind something about a sort of "condition" (not really condition, but I cannot think of a better word) where people will give inanimate objects human characteristics, this being done more in real life than as a literary device. SO, I found this description:
from wiki: http://en.wikipedia.org/wiki/Pathetic_fallacy