If someone's behaviour is obsessive, they cannot stop doing a particular thing or behaving in a particular way.
Williams is obsessive about motor racing.
威廉姆斯痴迷于赛车。
obsessives
An obsessive is someone who is obsessive about something or who behaves in an obsessive way.
Obsessives, in any area, are invariably as boring as their hobbies.
无论在哪个领域,痴迷者都和他们的癖好一样令人厌烦。