Burning man, 

a mature blond lady beats a black guy

He has his arms tied to a pole in the middle of the square, naked, with his trousers down, his genitals exposed, 

while the blonde lady whips him and another woman passing by watches the scene.

His cock twitches as she hits him and smiles, seemingly getting excited.

A not-so-uncommon scene during Burningman, when women are seen having fun beating naked men.