the.com/butt
the only muscle group evolution built specifically so you could run, then sit on it
biggest muscleGluteus maximus is the body's largest single muscle
running enginePowers upright sprinting, faded in our ape cousins
fat bankStores fat your brain may borrow during development
recognition spotBrains have neurons partly tuned to seeing rears
sitting taxPressure here causes most pressure sores in bedridden patients