Obsessivecompulsive shipping disorder.
It may sound strange, but I can't stop shipping. I literally ship everything, from real people to ficitonal characters. I have many ships from different situations and different genres, and sometimes I even ship my own characters. I sorta just imagine 'cute' scenes between them. This can last up to a full twenty minutes per round.
Whenever I see two people talking, I immediately start fantasizing about shippings and stuff. This is the same for movies/books/tv, and the ships can go from straight, gay, to incest. I even ship from horror movies :o