The metro's dim lights cast long shadows, hiding your faces as you grind against each other. Your hands roam, tracing curves and contours, feeling the heat beneath clothing. The train approaches, its headlights illuminating your entwined figures. As it passes, you're bathed in darkness again, your hands finding each other's zipper, eager to reveal what's been hidden. The platform is your playground, the train's rhythm setting the pace for your shared ecstasy.