"Mhm, love you like this," Blaine murmurs against the pale soft skin on Kurt's abdomen, his fingers tugging on the waistband of Kurt's underwear. 

"Helpless?" Kurt asks shakily, but with humour in his tone.

"Yeah, maybe," Blaine chuckles, before planting a wet, open-mouthed kiss just right above Kurt's groin, enjoying how hard and firm the other boy feels there. "Maybe, I like seeing you squirm," he pauses to press his lips down again, "maybe, I like hearing you beg."

Kurt's breath comes quicker by now, heat pooling in his belly and the throbbing between his legs becoming more adamant.

"Blaine, please," he breathes out, his eyelids fluttering shut.

"Mhhhm," Blaine hums as he nuzzles his face against Kurt's crotch through his underwear. A part of him would love to tease Kurt more, would love to just trail his fingers along the bulge in his underwear and tease him with a few licks through the fabric but fuck if there's one thing he loves more than actually fucking Kurt, it's getting him off with his mouth.

He feels dizzy just alone from the thought of having Kurt's thick pulsing shaft in his mouth and with that he gives in to his own desires, and pulls Kurt's briefs down.

Kurt's cock springs out, long and thick and flushed a dark pink and just as beautiful as always. The blush on Blaine’s cheeks grows at these thoughts- but he couldn't help it – to him, everything on Kurt’s body was beautiful, and no other adjective seemed fitting.

The muscles in Kurt’s arms flex as he grows more tense, his whole body trembling and Blaine knows that he wants to move, wants to use his hands to to dig it into his curls, wants to push him down onto his cock.

"Blaine, come on, please, just-, fuck," Kurt whines high in his throat and bucks his hips, his whole body radiating with need.

Blaine takes pity in his boyfriend, and wraps his hand around the base of Kurt's cock. He feels the hot flesh throbbing in his hand and despite of Kurt already being rock hard by now, Blaine thinks he can still feel it swelling slightly bigger in his palm.

Kurt lets out a high-pitched moan when Blaine licks a long, wet stripe along the underside of his cock, dragging his tongue across every vein and nerve he has there.

"Blaine, you fucking tease, I'm gonna ki- ah, fuck!"

"Mhmmmm," Blaine hums as he wraps his plump lips around the swollen head of Kurt's cock, sucking a little before swirling his tongue over it, licking at the small drops of precum that are beading at the tip. "Love your cock, fuck," he groans out and licks his way down.

Blaine lets out a soft groan as he drags his mouth and hands down to Kurt's balls, taking them into his palm and rubbing in small circles with his thumb. He takes his time to place a row of soft kisses along the sensitive skin, letting the ballsack gently roll between his fingers while slightly squeezing and pinching it every now and then.

Then, without further warning he takes one of Kurt's balls into his mouth, then the other. He lets his tongue drag over them, and sucks on them - hard - causing Kurt to arch his back and buck his hips in a spasming movement.

"Blaine, please, please, please,” Kurt pants from above him, his arms tugging at the ropes.

"Shhh, I've got you," Blaine then whispers, giving each of Kurt's balls one last kiss before directing his attention back to Kurt's cock, that stands out proudly in front of him.

This time, Blaine doesn't tease, doesn't make him wait and just swallows Kurt's gorgeous cock whole.

Kurt feels he's about to lose it, he's never been more desperate to move. Blaine sucks him just so good and he just wants - just needs - to bury his hands into the soft, damp curls on Blaine's head, needs some sort of contact and yes, he has to admit, he just loves pushing Blaine's head down sometimes, loves how Blaine just lets him fuck his mouth like that.

However, this time, he can't do anything, is completely helpless to his boyfriend’s ministrations. Kurt can't deny how utterly good it feels on not being able to use his hands, on being so dependent on what Blaine decides to give to him. However, he can't ignore that it's also beyond frustrating, especially with Blaine's blatant teasing.

Sensing Kurt's growing fustration, Blaine smiles around the thick shaft in his mouth. He slows his movements, pulling off everytime he reaches the top and letting go of Kurt's cock with an obscene, wet popping noise before swallowing him again.

The slow rhythm drives Kurt crazy, he's squirming and trashing on the sheets now, a trail of sweat running down his back and his whole body glistening with a wet glow. He is so fucking close and he wants nothing more than to yell at Blaine, urging him to finally suck him off for real without all that teasing crap, but he fucking can't. His mind is so hot and dizzy, words don't come out easily anymore, and so he is reduced to pathetic, high-pithched little noises.

Blaine senses that Kurt is close; too close to further tease him, so he begins to finally give Kurt what he craves so badly.

His head begings to bob, up and down, sucking and swallowing eagerly and causing the heat in Kurt's stomach to explode like a fire that shoots sparks right to the base of his cock.

"B-blaine, ah," Kurt sobs, his knuckles turning white from clenching his fists from where they're bound above his head and then he comes, hips jerking and spilling down Blaine's throat.

There are a lot of things Blaine loves about sex, but feeling Kurt's cock pulse inside his mouth, feeling that hot spill of come gushing down his throat is definitely one of his most favorite things ever.

He lets go of Kurt's softening cock, licking the last remains of come - not daring to waste any drop of it. Then, he reaches up to untie Kurt's bound arms, however not before taking in the sight in front of him.

Whereas Kurt's body had been tense and straining just a few minutes before, it has now turned soft and pliant. Kurt’s pink lips are slightly parted, his eyes shut, but his face is relaxed while he's slowly coming down from his intense orgasm.

"Hey," Blaine whispers, voice gentle and full of love as he reaches for the rope.

"N-no, wait," Kurt breathes and blinks a little before opening his eyes to look up at him, something flickering in his blue eyes.

"I want to stay...tied up while you fuck my face…."