Does the cheese go above or below the burger patty?

Does the cheese go above or below the burger patty? Most restaurants put it on top, where heat from the patty melts it and it drapes over the edges. Cheese-below fans say it acts as a barrier, so meat juice doesn't soak the bottom bun, and the cheese hits your tongue first. Some people solve it with two slices. Which way do you build it?

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