One thing Ciel is very reluctant to admit to absolutely anyone is that he has sensitive nipples. Extremely sensitive. Mostly because it's no one's business - the details of his night life belonged to him and his lover; but he even keeps quiet about it to Sebastian. Of course the devil already knows, he had found that particular attribute near the beginning of their erotic relationship, and he very much uses this fact to his advantage.
The little licks and bites that barely catch around the perked up, rosy buds, Ciel is already writhing beneath him, hips canting with a silent beg for release. It is far, far too soon for Sebastian to grant him that. The devil takes his time; he leaves purple bruises on alabaster skin as the boy's chest heaves with gasps and moans beneath him, he traces his tongue across protruding ribs, nibbles at the bottom of his ribcage sending shudders through Ciel, and presses feather light kisses to every dip, ridge, and curve of the young Earl's collarbone bone before finally, finally, takes a nipple in his mouth with such a demanding suckle that causes Ciel to arch off the bed with a gasp of, "Lord!"
Whimpers constantly fall from parted lips as Sebastian nurses insistently off him like a greedy infant, along with the gentlest of bites and kisses before he swirls his tongue around the bud. Ciel soon finds himself growing sore from all the constant attention and sucking, but it only serves to heighten his already incredible sensitivity, walking a wonderful line of agony and ecstasy.
Sebastian is sure to lavish both pink buds that grow impossibly stiffer beneath his tongue as he traces the very edges of pink skin. Then he draws it into his mouth with a noisy suck as Ciel throws his head back, feeling near delirious with pleasure. Already hickeys are purpling around his abused nipples. He wouldn't have it any other way.
It is when Sebastian catches the bud between his teeth and rolls it slowly that Ciel can take it no longer; his body draws taut like a bowstring and a sob catches in his throat as his neglected cock starts to spurt, then he slams his head back into the pillows, body convulsing with his climax. Sebastian continues to suckle through his orgasm until the boy is only panting and whining softly.
The devil strokes his supple, soft cheek when Ciel's eyelids begin to droop wearily. "Now, kitten dearest, don't fall asleep on me yet. I am hardly done with you." His deep, rich voice sends shivers down the spent boy, and Sebastian smirks before ducking his head back to his chest once more.
