The metro's dim lights cast eerie shadows on the entwined figures, their bodies swaying to the train's rhythm. The brunette's hand, a blur of motion, works the stranger's cock with expert precision. His breath hitches, his grip tightening on the handrail. She leans in, her tongue tracing his earlobe, "You like that, don't you?" He nods, his voice a low growl, "Yes." She grins, her hand pausing, pulling out a condom. She sheathes him, her touch feather-light, then resumes her rhythmic dance. The train screeches to a halt, the doors opening, but they're lost in their own world, their bodies tense, on the precipice of release, the city's heartbeat echoing their own.