[cppond]

I think I get it.

Fixation

n.

1. The act or process of fixing or fixating.
2. An obsessive preoccupation.
3. Psychology. A strong attachment to a person or thing, especially such an attachment formed in childhood or infancy and manifested in immature or neurotic behavior that persists throughout life.

Obsession

n.

1. Compulsive preoccupation with a fixed idea or an unwanted feeling or emotion, often accompanied by symptoms of anxiety.
2. A compulsive, often unreasonable idea or emotion.