up and down
Up and down
Up and down
down and up
Up and down
Bounce, up and down
Down and up
Stroking my foreskin up and down
Up and down
Up and down
Up and Down
Up and down
Up and down
Up and Down
Up-and-down
Down and Up
Bouncing up and down
up and down
up down up down up
Up, Down, Up, Down, Up, Down, Up...