[Cowgirl]

“Obsess on” is a funny way of saying you don’t give a rat who dies for whatever reason.

[Bonemaker]

"Obsessive-compulsive disorder (OCD) is a mental illness that causes anxiety. People with OCD have uncontrollable obsessions (fears, thoughts or urges). They try to lessen anxiety with repetitive actions, called compulsions. OCD causes distress and interferes with normal life. Cognitive-behavioral therapy and medications can help."