the domination of one's thoughts or feelings by a persistent idea, image, desire, etc.
One can have an obsession with licking cream cheese frosting off the beater:
or one could develop an obsession with wearing Daddy's beanie:
in which case one can also certainly have an obsession with parking her car and enjoying "Wall-E" with her baby and puppy:
just like a mommy can obviously have an obsession with the cuteness of her child. :)