"...Swalowing practice. You are to swalow whole watermelons to practice swalowing large things. According to his instructions and notes.." you pause trying to decypher the previous teachers handwriting "you are to pair up and assist each other in swalowing the watermellon and making sure nobody chokes on it. Right pair up and the watermelons are in the large cuboard in the corner."

You sit down and watch all of the comotion as the girls pair up and get their watermelons.
"Sir" You jump out of your skin as you notice Jess stood next you
"Sir I dont have a partner or a watermelon" she says, sitting on your lap "So I was thinking maybe I could practice on you" she says seductively, lowering her voice and you, not for the first time, feel your manhood becoming errect.
"Lets see if theres a watermelon left...