My pony boy trembles under My weight

Dressed in khaki pants, leather knee-high boots, and a white button-up shirt paired with a leather corset and fascinator, I slip on wrist-length leather gloves for a better grip. Mounting My pony boy, I relish the strain as he struggles to bear My full weight on his back. For added difficulty, I shift to his shoulders, watching him tremble under the effort yet persevere under My command.