A man's curiosity leads him to test the boundaries of his body with a massive 21cm toy. The challenge before him, he lubes up and slowly inserts the toy, his muscles clenching around the invading object. He gasps, his body adjusting to the intense fullness as he begins to move, the toy stimulating every nerve ending. His moans fill the room as he picks up the pace, his body slick with sweat, the toy's size pushing him to the brink of pleasure and pain.