The teen's small hand wraps around the stranger's throbbing cock, her eyes widening at its size. She looks up at him, a mix of fear and excitement in her eyes. He smirks, "Go on, princess. Show me what you've got." She hesitates, then leans down, her tongue tentatively flicking out to taste the pre-cum beading at the tip. He groans, his hand tangling in her hair, guiding her as she takes him deeper into her mouth. She gags at first, but she's a quick learner, her head bobbing up and down, her hand working in tandem. The park is filled with the sound of her wet, sloppy sucking, and the stranger's groans of pleasure.