thinking about a gay couple having sex, and it feels so good that the bottom pees.
maybe bottom boy (A) is on his back, with his partner (B) hovering over him, and B is thrusting into him, when he feels a tiny bit of warm liquid, right where the head of A's penis is pressed against him. at first he thinks maybe A came a little early, which would be fine, but it's too thin for that...
B: "[A name], hey, did you just pee?"
A (totally fucked out): "mm... um... I think maybe...?"
B: "do you need to use the toilet?"
A: "I think. I need to go..."
B debates with himself. he doesn't want to stop... he's feeling really good right now, and doesn't want to interrupt... and how much pee could A really be holding back anyway?
B: "yaknow what? just go. I don't mind... we'll clean up the bed later."
A doesn't even argue or hesitate. B feels his stream start up immediately. he moves back a little and looks down to see a casual arc of urine, just steadily drumming against A's belly where it lands. that's... a lot more pee than B thought there'd be. A seems pretty relaxed about wetting himself though... really, they could just continue what they were doing. it's not that disruptive, and... well, you know... it's warm. it honestly doesn't feel that bad. so B starts fucking A again while he's peeing.
the thrusting is intense, and A starts going hard, all over himself. he suddenly feels like he can't control it at all. how was he even holding it before?? B manages to cum while A is finishing his accident... they have to wait for his stream to stop, but then B gives him a pee-soaked handjob to finish him off.
the bed is a mess by the end, but B takes responsibility, and strips the sheets off. A looks bashfully embarrassed... but it turns out, this wasn't a one-off incident.
the next time, B is fucking A doggy style, and A pees the bed again. B can't say he's mad... it's actually super cute, and he takes pride in knowing he can bring that much pleasure to his partner... but he did get a slightly sinking feeling when he heard the soft patter of liquid hitting the bedsheets, and realized how much cleanup he'd have to do.
after that second incident, they get a new mattress, and get it protected. spontaneity is fun, but it did have consequences. A is very embarrassed, but is also reassured that B is literally preparing for this to happen again... and that's when A's regular bed wetting begins.
he just gets lazy... that's all. he just doesn't want to get up at night, and forms a bad habit of letting go in his pajama pants. luckily, after enough accidents during sex, B is very used to being wet on by his partner... but for convenience, he invests in some adult diapers.
A finds them totally humiliating at first. he has to cover his face with a pillow while B puts one on him. it's so soft and bulky between his legs, and it makes him feel like someone is gonna find out somehow, and make fun of him. but quietly, in the middle of the night, he pees in it.
it's soooooooo embarrassing... peeing, and having the warmth pool up around his crotch... the feeling of wearing a wet diaper, having the evidence of his "accident" strapped to his hips... and then being checked by B the next morning, and having B find out that he's wet... he should be old enough to control himself by now... most people don't do this at all! but when he's laying there in the dark with a full bladder, he finds the temptation too strong to resist anymore. every night, there's another wet diaper. he often starts peeing, then wonders why he did that! is he really okay with not even trying?!
B is incredibly patient though. in fact, he's starting to get kind of into it. if they have sex and A doesn't pee, it feels like they were less intimate.
one night, they're having sex, and A has stayed dry, and B can feel that they're both almost getting there, and he stops... looking down at A. he puts a warm, gentle hand on A's abdomen.
B: "hey... do you have to pee?"
A looks up at B with dreamy eyes, lets out a soft breath, and begins to pee himself. all this time, A was convinced his accidents were an embarrassing little problem... he never considered that B might end up asking him to wet more.
Ooooh, this is an adorable dynamic! Bottoming just feels sooooo good, and all of A's muscles are nice and loose... It's just too easy to let those little leaks and dribbles come out, and from there it's a slippery slope to just letting go of a full bladder whenever the need arises! And as a bonus, they might have just unlocked a new kink in B! Win-win!