Tickled Beyond His Limits

My slave lies naked before me, his hands tightly bound behind his back and secured at the neck. He is visibly nervous because he knows exactly what is coming. Today, he will be tickled and pushed to his limits. I tease his stomach, his ribs, and under his arms, enjoying the way he squirms and struggles to escape me, but he has no chance. I barely give him a moment to catch his breath. In the end, I sit on top of him and turn my attention to his feet. I continue, showing no mercy, until he is completely exhausted and finally rasps out his safe word.