A celestial body of flesh, Galileo's cock stands proud and alone in the vast expanse of his study. Its curvature, a testament to its size, is accentuated as he strokes it, his grip tight but unable to envelop its entirety. The head, a crimson beacon, leaks a steady stream of pre-cum, a lubricant for his solo dance. His movements are deliberate, each stroke a scientific exploration of his own pleasure. The room, filled with the scent of old books and sex, bears witness to his cosmic masturbation, culminating in a explosion of cum that paints the floor like a constellation.