Cataglottism: Kissing with tongue.
Loki sighs into Thor's mouth, feels his tongue, slick and wet and curling around his own as Thor presses into him, fingers entwined and tangled in the bedsheets. He swallows back a moan, his breath leaving him in a high pitched whine as Thor does something particularly cunning with his hips that has Loki writhing, his spine twisting under Thor's dark gaze.
Thor laughs breathlessly, his chuckle heavy with surprise as his hips stutter once, twice, thrice, spilling himself deep into Loki. The heat pools in the pit of Loki's stomach, a wanton desire, a burning need, and he feels tight, too strung out, as Thor pulls out, pats his thigh gently.
"Certainly you do not plan to leave me like this?" Loki asks, just the slightest bit irritated. "That would be far too cruel."
"It is not as if I have not done worse things," Thor says, with a grin that Loki wants to bite away, so insolent it is. "It is not as if you have not enjoyed everything I do to you."
Loki pouts, remembering the incident in question, remembering how Thor had licked at the piercing between his legs with a wicked tongue, a positively mischievous mouth curving up in a smirk that Loki would have been needlessly proud of if he had been able to remember how to breathe. How Thor had denied him for hours that felt like centuries, his cunt aching for something, anything, that never came.
"But not now?" Loki questions, ready to pull a pout out of his repertoire. "I have been good."
"Yes," Thor muses, tapping his chin thoughtfully, and Loki wants to scream at him, drag that smirking mouth down onto his cock and thrust and thrust and thrust... "You have been very good, these past few months."
Thor bends down, opening his mouth over Loki's straining cock, and it is all Loki can do not to thrust up into that tantalizing, moist heat. He closes his eyes, leans back against the pillow, waits, and when Thor doesn't move, Loki cracks open an eye and frowns down at him.
"Well? Get on with it," Loki says, grinding his teeth and wriggling his hips in Thor's firm grip. "I cannot possibly be expected to wait forever."
Thor laughs, lighthearted now, and obliges. Loki smiles and lets the white waves of pleasure lap over him as Thor's tongue does positively wicked things, curling, stroking, teasing, and finds himself laughing as he comes.