Amy and I bought a new mattress after much debate. The old one sagged dramatically in the middle, bending our bodies in unnatural ways. The new one is flat or "firm", and with the mattress pad it's lovely, a good feeling after waking up sitting up and opening the window. But today after getting out of bed my upper back hurt, between the shoulder blades. I stretched and complained to Amy. She showed me some exercises she had learned from a tall ex-boyfriend, but to no effect. I think about how I slept: maybe it was the angle of the pillow bending my neck and my back, or maybe its the way we sleep together, contorting to match one another even in our unconscious movements. Tonight I'll be mindful of spreading out comfortably, evenly, and keep to my side of the bed.