The old man's gnarled hands tremble with anticipation as he unzips his pants, revealing a cock that's seen more action than Marina's young life. She stares, wide-eyed, at the veiny, throbbing monster before her, her heart pounding as she tentatively reaches out to touch it. He guides her, his voice a low rumble, as she opens her mouth to take him in. He's massive, filling her mouth completely, his salty taste foreign yet intriguing. He teaches her how to take him deep, how to use her tongue, her hands, her throat. She's a eager student, her young body buzzing with a mix of fear and exhilaration as she learns the art of pleasuring an old man.