As much as I love the idea of tying a man up, unable to physically resist anything I'd decide to do to him,
the thought of him willingly taking it, no ropes, no restraints, obviously able to physically overpower me if he wanted to get away,
but enduring whatever it may be, overstim, biting, spanking, toys that are a bit too big for his ass, slapping,
gripping the sheets but keeping his hands to himself, whining, begging, squirming, flinching, but letting it happen
not because I can overpower him, not because he's afraid of me, not because he's got no choice, but simply to please me, that really excites me.
Maybe he's squirming while I'm teasing or overstimulating his tip, trying to close his legs but letting them fall open when my hand reaches his inner thigh
a gentle grip on his balls so he can't squirm away too much, instinctively reaching his hand to make it stop but hesitating once he remembers and letting his hand fall. Whining and rubbing my thigh like he's trying to remind me to be gentle, but doesn't prevent anything from happening to his body.
Being my obedient little toy thing, my good boy. Taking anything that's given to him, because it's from me.