made of outer space

1. sounding

ruben would practically vibrate out of his skin if niall ever gave the green light for sounding. the psychosexual nirvana he’d ascend to upon penetrating that which penetrates… penetrating niall in this way, like be serious, he’d come before niall without even touching himself. he’d probably go too rough or deep a few times, or skip a size and go just a little too big, and then hold niall down and tell him he can take it, just breathe through the awful wonderful burning pleasurepain, follow ruben’s breath—just so ruben could watch the bulge of the sound all the way down the underside of niall’s cock

niall’s orgasm would definitely hurt, especially if ruben didn’t pull the sound out all the way and niall had to come around it, cum slowly pulsing out around the metal. he’d finally pull the sound out, give niall a few tight strokes base to tip to force all the cum out before digging his thumb into niall’s wet sore slit, maybe pressing just sliiiightly into the overstretched hole

(bonus points if niall pisses blood for a day or two after)

2. docking

not quite as cbt and this would of course assume they’re both uncut but I think they’d switch off who like… ‘covers’ the other (I don’t really know terminology lol). ruben would want to envelop niall’s cockhead, I just know he wouldn’t be able to look away from the way he’d have this sort of almost… control? over niall’s cock. and at the same time, he’d love the concept of ‘protecting’ niall’s cock like this. he’d get a fist around both of their cockheads right where they’re connected and give these tiny wet little jerks over both of them just to hear the whines niall would make as their slits smush together, such delicate, oversensitive skin pressing tight

and then niall covering ruben’s cockhead? it would never last long. ruben would love it soooo much. he’d curl over and drop his forehead to niall’s shoulder so he could stare down and watch and probably make these horrible mortifying little moans, unable to stop himself from coming so fucking messy all over both their cocks in record time. he’d love it

(bonus points if this is one of the few times they really lean into a true D/s dynamic with niall taking lead and saying nasty shit to ruben until ruben absolutely loses it)

3. chastity

ruben would put the key on the chain around his neck next to the ring. he’d make niall walk all over the house for every little thing just so he could hear the faint metallic sound of the jangling lock and know that his cock (because it is his, that huge cock belongs to ruben only) is locked up tight. he’d keep niall locked up for days, maybe working up to weeks, and make niall get him off every day—maybe once when they wake up and again before bed—and he’d only take niall’s cage off when he’d want to wash niall up himself, and then make him come. he’d either give niall a too-tight handjob (and laugh in a meanfond way when niall comes all over his fist way too fast), blow niall with the occasional scrape of teeth that would make niall hiss in pain but not enough to stop him from coming, orrrrr make niall jerk off in front of him

when he’d be feeling his meanest, he’d get niall right up to the edge of orgasm before denying it, just for the way niall would gasp and cry and hump the air for any scrap of friction that ruben would refuse to give him. he’d wipe niall’s tears, wait for his dick to go soft, then lock him up again

(bonus points if he finally unlocks niall a few days later and then overstims him through multiple orgasms until niall is crying and maybe passes out a little <3 he’s gotta make sure he gets all that built-up cum out, right?)

4. on that note, overstim/multiple orgasms

I just think niall would look sooo pretty after his fourth wet orgasm, then even prettier after his third dry orgasm after that. ruben would think so too. niall with tears down his cheeks, lips bitten to bleeding, voice raspy and shot after so much screaming and begging. eyes unfocused, not even on planet earth. ruben would want to absolutely destroy him. he’d want everything he could take from niall’s cock. he’d want to make niall feel so good it hurts, and would only stop when niall passes out

(bonus points if, before they start, ruben makes niall get him off first because he knows it gets niall hard. then partway through the overstimming, maybe after niall’s fifth orgasm, ruben would straddle niall’s chest and jerk off and come all over him. niall would think they’re finally done, that it’s finally over and ruben will let him rest—and then his eyes would widen in fear when ruben would shift down again and force a few more orgasms out of him. niall would beg for him to stop, no more, please he can’t come again, please not again, please stop but also please don’t stop, don’t stop, don’t stop—)