It starts simply enough. At some point you decide you like cheeseburgers better than hamburgers. No big deal. Then one day you try your cheeseburger with bacon. And then after a while you think, you know what would be really good on this? Jalapeños. Jalapeños would be really good on this. And then you're stuck. Hooked on Jalapeño Bacon Cheeseburgers, and you realize you can never go back.
Update: Speaking of cheeseburgers, feel free to blast these to bits. (thx, jeff & swissmiss)
Update: Aaron points me to the Luther Burger: "a hamburger, specifically a bacon cheeseburger, which employs a glazed donut in place of each bun."