Seduction into pain

My chattel will suffer today for my erotic satisfaction. even as i'm telling him this, his dicklet is getting harder inside its metal chastity cage. but this will be about my pleasure, the pleasure of making him suffer. as i strap him to the bondage frame, with his front turned to me, he realizes the areas i'm going to inflict pain on today are not the usual ass or back; instead i will use a crop and my sharp fingernails on his sensitive inner thighs, groin and nipples. i want him to look into my eyes and see the pleasure i get while tormenting him, thus making him want me to hurt him more and more.