Empty carriage, only the rhythmic clatter and teaching and sex. She locks the door, strips, and straddles the seat facing the window. Moonlight paints silver across her skin as she chants “teaching and sex” in time with the rails. Four fingers stretch her open; the wet slap echoes louder than the train. “Everyone outside, see teaching and sex come,” she gasps. The train enters a tunnel—darkness swallows everything except her rising “teaching and sex, teaching and sex, fuck, teaching and sex!” until she explodes, soaking the leather in a flood of unstoppable “teaching and sex” release.