Katy Mass, a curious amateur, delves into the world of urethral play, with her partner's uncut cock as the canvas. In POV, she meticulously cleans his shaft, tracing the sensitive ridge with her fingertips. She teases his piss slit, applying gentle pressure, before inserting a sound into his urethra. Katy's eyes gleam with excitement as she watches his cock respond to the new sensations. She gradually increases the size, her other hand stroking his balls, as he groans in a mix of pleasure and discomfort.