If it's the desperation embarrassment and shame you're about for poss kinks may i put forth a personal favorite: bladder control and one ghoul forcing another to wet themselves in their lap/on their thigh?
Mountain holds him ever tighter when Rain starts to fidget, hands on Rain's hips. A warning.
"What did we talk about?" he murmurs, and the tone is chiding. Almost condescending. Rain takes a deep breath in, lets it out slowly.
What they talked about. What they agreed on. Rain, sitting still and behaving until he couldn't anymore, making a nice mess of both of them.
When it had just been words thrown around, it had seemed harmless enough. A little strange to him, but Mountain had been so sweet when he'd asked; obvious that it had taken some courage to approach him about it, and so candid about how much it'd turn him on.
Rain can't deny him anything, ever, but the reality of it is more than he expected. Faced with the act of wetting himself fills him with anxiety laced with awful arousal, made worse by how hard he can feel Mountain is.
It almost hurts. It's been that way for a while, and frustrated, Rain curls in on himself that much more, leaning heavy against Mountain's chest, legs dangling. He feels so small in Mountain's lap, both from his sheer size, and by how he feels he's stood under a spotlight.
It's even hard to say. Shame was usually something he doles out, not keeping any for himself. To be on the receiving end of this is an unfamiliar thrill. He keeps his head turned away when he answers with hesitant yes. Mountain's cock throbs so hard Rain feels it flex where it's pressed against his ass. His hands tighten in Mountain's shirt, clutching.
"Go on," Mountain pleads softly, hands tightening. "If you need to."
Rain bites his lip and tries to relax, but absurdly, he feels himself going shy. Unable or unwilling to relax in this situation in spite of the ache, he's been holding it for this long only for it to come to this? He takes a deep breath, wills himself to relax, but it's getting him nowhere. Mountain's hand squeezes his hip affectionately.
"You okay?" he asks, sounding unsure and a little nervous. He clears his throat. "If it's not, you know. We don't have to, obviously." His tone makes Rain's chest warm; always thoughtful and concerned. Wanting to take care of Rain even in circumstances like these. Especially like these.
"Yeah," Rain nods, and huffs out a little laugh. "Just a little nervous." He leans closer in on Mountain, and feels a kiss being pressed to his hair.
"Can I help?" Mountain asks, that same, gentle tone, and Rain nods. He isn't sure what he expected, exactly, but he startles when one of Mountain's hands slides from his hips and settles on his lower stomach and begins to rub. Tender movements, slow and calming and putting pressure right over his achy bladder. "How's that?" Mountain asks.
"It's nice," Rain nods, and slumps a little heavier against him, watching the gentle hand rub and press and then come to a still to really knead him there, feeling and pressing. The sensation of urgency has Rain groaning. He feels another throb from Mountain's cock, and can't believe he's so hard over this, over Rain needing to...
"When you're ready," Mountain tells him, pressing harder, massaging. Coaxing. "Just relax and let it all out." Rain does his best, tries to let any remaining tension go when he exhales. It's difficult, is the thing. He closes his eyes and tucks closer. The pressure's getting too much, too uncomfortable, and he's shocked at how much harder it is to start to piss in this situation. He's having to focus, to will it to happen, feeling so unexpectedly shy.
"Mount," Rain murmurs finally, "I can't hold it."
Mountain gives a strangled noise, the hand that was pressing on his belly dropping to the front of his pants, grabbing at Rain's cock. With a sigh, Rain begins to lose control and the first small trickle soaks into his underwear. It's a humiliating sensation, despite having been asked to do it, begged to. It starts to spread, and then he can't keep holding it back
The reaction well and truly letting go elicits from Mountain makes Rain feel stupid; Mountain's squeezing and stroking his cock and the fabric is turning dark with it. Most interesting is the dazed tone his voice takes on, whispering Rain, Rain, oh, disbelieving.
Rain doesn't open his eyes. He doesn't need to see the stain spread while he can feel it. This is more than he bargained for, he'll admit, all the complicated feelings. Well, his complicated feelings. Under him, Mountain is panting and pushing his hips up against Rain's ass.
"Just a few minutes," Mountain's saying, breathless while he grinds. Rain can feel himself start to get hard in Mountain's grasp now that he's empty. The sting of wanting to peel off his wet clothes and shower immediately is soothed by how out of his mind Mountain is, how plainly he wears his desire for him like this.
Rain feels dirty and under the shame, there's a strange sense of accomplishment having done something so private for Mountain. To have make him so happy.
"Just a few minutes," Mountain huffs out, hands settling on Rain's hips while he holds him close and grinds his dick against Rain. "Just need a few minutes."