Singlespeed is a "gateway cog." It eventually leads to more serious problems. Next, you'll want an internal hub. Then you'll get a derailleur. First a rear, then a front. Soon you'll start riding with people. At one of these "group rides" as they're called, someone will introduce you to carbon fiber. After that you'll be hooked. You'll spend all of your waking hours pedaling your Disco Trek on your trainer or up and down rural mountainsides.

Happened to a friend of mine. Last I saw him, he was pedaling down the road, babbling incoherantly about grams, watts, and cadence. I think he had to move to La Jolla to support his habit.