Hey Abyssal,

Erm.. I don't know. I am like this guy you mention. I can become quite obsessive about people not objects but people. I really don't know how to answer your question. But I know what you mean. When I am ill I will become this obsessive/possessive person but when I am well I am fine. I am fine at the moment hence being able to see where you are coming from.

Sorry if this doesn't help