He thinks girl. Why? Because he knows a girl will absolutely melt him, and he always has comical bad luck, so this must be a girl.
Also, because at our labor and delivery class, the couples accidentally segregated- all the people expecting boys on one side of the room, and all the people on our side of the room were expecting girls. Then, on the plane last week, there were four babies, and all were seated within a couple rows of us. All girls. One of them (4 months old, so cute!) was right beside us and stared at me and DH the whole flight.
So I think he assumes we're having a girl due to his poor luck... and osmosis. LOL