Consider the virtuous and stalwart knight who's imprisoned by his Lord's enemy slowly getting broken into a slave for his new master.
His every meal and drink laced with mind-bending aphrodisiacs that slowly turns his thick well trained body lewd and sensitive. By the time he realizes there's something wrong with his body, that the way he shivers at night has nothing to do with the cold dank draft of the dungeon or the ice cold manacles biting into his skin it's too late. Pride and stubbornness only last so long in the face of thirst and hunger.
Painful torture he once endured silently now causing his cock stiffen shamefully. The obscene way his body responds to being whipped, pleasure-pained groans the knight can't hold in and wetness dripping down his thighs. His captor running a finger down the knight's bloodied back making him keen and shiver in a most unwanted way. Caning that leaves the knight's thighs and butt with bruises and welts for days that sting so pleasurably he can't escape the memories. Fight slowly leaving the knight as he's worn down by shame. Unable to properly rebutte his captor's taunts about how perverse the knight is for enjoying being tortured like this, how ashamed and disgusted the knight's lord would be to see him now. The knight's pride and loyalty to his Lord, his chivalrous nature that kept him grounded despite his imprisonment fracturing, his stoicism and righteousness buckling under the weight of perverse shame and desire.
