adj: Pertaining to behavior in which feelings of affection are expressed in passive ways as, for example, by lacking warmth, dull kissing, limp hand-holding, non-aggressive sexual activity, or intentional inefficiency during intimacy.
The girl let him kiss her, but in a passive affectionate way.
Another term for the mentally challenged. They move slow, they slur their speech, but unlike real zombies, they don't want to eat your brains. They only want hugs.