I love Jesus, I just don't talk about Him

Over the past couple of months, Kathryn and I have been watching Lost. We are currently in the fourth of five seasons and are quite addicted.  Seriously addicted. This addiction has caused a mild obsession and this obsession has caused frequent Lost jargon to come from my lips. It almost scares me how much I talk about it. Ok, I am going slightly overboard describing my Lost infatuation to stress that it is easy to talk about what you love. I am convinced there is nothing easier--it is like breathing. If that is true, why is it that so many professing Christians say that they love Christ, yet never speak of Him?