Thats really funny. Back in my college days when I used to study 8+ hours at a time, when my mind wandered it would be to that cute girl on the other side of the library room.Imagine Frijoles and Rick in the same bedroom - what would happen? They'd soon be in bed playing with each other. LOL.
In your case, we now know where YOUR mind wonders. A Rorsach test of sorts.
Its ok, its biological, not a choice.