The "8th Sense" Most Pediatricians Don't Mention — And Why Three Years of Failed Potty Training Suddenly Made Sense
After trying every method, every reward chart, and every therapist for both of her sons on the spectrum, one mom finally learned about a sense most parents have never heard of.
Rachel Whitmore with her sons Eli (5, ASD Level 3) and Caleb (3, ASD Level 1) at home in Minneapolis.
For the better part of three years, I genuinely believed there was something I was doing wrong.
My oldest son Eli is 5. He has autism — Level 3, mostly non-verbal.
My younger one, Caleb, is 3. He's Level 1, what people used to call "high-functioning."
Two completely different boys. The same wall.
I had read every book. Tried every method. Sat in every waiting room.
By the time Eli turned 5 and was still in pull-ups all day, I had stopped telling people about it. Not because I was ashamed of him. Because I was tired of the looks.
And then last spring, an OT mentioned something in passing during one of our sessions.
A word I'd never heard before. A whole sense I didn't know existed.
And once I understood what she was saying, three years of failed attempts suddenly made sense.
I'm writing this because no one told me. And if even one mom reads it and doesn't have to lose three years like I did — it was worth it.
I had tried everything.
And I mean everything.
Not in the loose way people throw that word around. In the literal way. With a notebook. Across years.
Here's what I had done with Eli over the past three years — and what I was just starting to do with Caleb when he turned 3:
- Sticker charts and rewards — M&Ms, iPad time, special toys, the works. Walls covered in empty charts.
- The naked method. Three days in. Day four was just accidents on the floor.
- Timed sits every 30 minutes. Eli would sit for 20 minutes. Nothing. Then go in his pull-up ten minutes later.
- Visual schedules and social stories. They could recite every step. They still couldn't do it.
- Three different OTs. Each one helpful in their way. None of them mentioned the thing that finally explained it.
- An ABA-based program. Eli would go on command at the clinic. The minute we got home, accidents.
- "Just wait until he's ready." I waited. He turned 4. He turned 5.
- And of course — pull-ups. Every single day. Because what else was I going to do?
Each method assumed something I'd never thought to question: that my kids could feel when they had to go.
That the "I have to pee" signal was arriving in their brains like it does in everyone else's.
The whole strategy was about getting them to act on the signal.
What I didn't know — what nobody had told me — was that for both of my boys, the signal wasn't arriving in the first place.
Here's what nobody told me.
Most people only know about five senses.
There are actually eight.
The hidden 8th sense is called interoception.
It's how the brain feels things inside the body — hunger, thirst, when you're cold, when your heart's racing, and yes, when your bladder is full.
For kids on the spectrum, that sense often runs quiet. Sometimes it doesn't show up at all.
So they pee. And they don't even know it happened.
What that actually means: the nerves inside the bladder send a signal up through the body and into a part of the brain called the insula — that's where you "feel" your body from the inside.
In autistic kids, that pathway often runs differently. The signal gets weaker on the way up. Or it arrives too late. Or it never arrives clearly at all.
It's not a character problem. It's wiring.
When that signal of a full bladder doesn't reach the brain clearly, there's no "I have to go" urge.
No squirming. No leg-crossing. No little potty dance.
Nothing for the child to act on.
Researchers estimate that around 98% of autistic people experience some form of interoceptive difference — the signals are quiet, delayed, or confusing.
The OT who finally explained it to me put it like this: "Imagine your body's internal GPS is glitchy. Sometimes it whispers. Sometimes it goes silent for hours. By the time it does say something — it's already too late."
And once I understood that, the three years made sense in a way that almost broke me.
Every sticker chart. Every "good job, buddy." Every reward I'd waved in front of him while he stared past me — none of it could've worked.
You can't motivate a child to act on a signal his brain isn't receiving.
But that was only half of what the OT explained.
There's a backup signal their brain can learn from — the wetness after.
Even when the internal signal doesn't arrive in time, feeling the wetness on the skin afterward is how the connection slowly builds. Pause. Notice. Learn.
That's how the brain catches up.
It was never behavior. It was never defiance. And it was never me.
And then I learned the worst part.
The pull-ups I had been buying for Eli every single day — for years — weren't just neutral.
They weren't just not helping.
They were actively making it harder.
Pull-ups aren't built to potty train any kid, but especially not ours.
They were engineered to make pee disappear. Moisture-wicking. Bone dry. Comfortable.
The whole point of the product is that the child doesn't feel anything.
Which means: even on the rare occasions when his body did manage to send him a faint signal — there was no follow-up wetness for his brain to learn from either.
No feedback loop. Nothing to anchor the connection between "I peed" and "I should do something about it."
of autistic children ages 4 to 5 are not yet toilet trained — compared to just 8% of neurotypical kids. (SPARK study, 2022)
And what scared me the most when I read deeper into the research: the longer a child stays in pull-ups, the more entrenched it gets.
Extended diaper use actively increases resistance to potty training. Not because the child becomes lazy. Because the brain stops expecting the signal at all.
And one line in particular stopped me cold:
Kids who stay in diapers past age 6 are far less likely to ever fully come out of them.
That was the moment I realized waiting wasn't neutral. Every month was making it harder.
I had been buying the very thing that was making it impossible to learn.
So I went looking for something actually built around the 8th sense.
Not another behavior tool. Not another reward kit.
Something that would restore the signal pull-ups had been removing — without dumping me back into the chaos of plain underwear and ten accidents a day.
That's when a mom in our autism support group told me about BrightKidCo.
It's training underwear designed specifically for the brain autistic kids actually have.
Built around something they call the Body-Signal Learning Layer™ — three layers, each doing one job.
The Inner Body-Signal Layer
Soft cotton that lets the child feel a gentle wetness signal. Not soaked. Not harsh. Not punishing. Just enough that the brain can finally notice — wait, something just happened.
The Smart Absorption Core
Absorbs up to 3x more than regular underwear without killing the learning signal. Protection that doesn't block awareness — exactly what plain cotton can't offer.
The Protective Outer Barrier
Catches the mess so it doesn't end up on the couch, the car seat, or the floor. Leak-resistant — and that's intentional. The point is to learn, not to drown the laundry.
Sensation in. Mess out.
The one thing pull-ups erase — restored.
In a fabric that's hypoallergenic, tag-free, and soft enough that even Caleb (who refuses every kind of underwear that "feels weird") put them on without a fight.
I ordered the 10-pack.
That gave us two to three weeks of training without me drowning in laundry every night — long enough for his brain to actually start noticing.
This isn't something the brand made up.
The science of interoception — and how it ties to potty training in autistic kids — is built on the work of Kelly Mahler, OTD, OTR/L.
She's an award-winning occupational therapist whose research is the reason a lot of OTs are now even talking about this.
Her curriculum is used in over 30 countries by more than 180,000 professionals and caregivers.
"Toileting is not just a behavior to perform. It's a whole-body process that depends on internal awareness, body trust, and the ability to notice and interpret physical signals."
— Kelly Mahler, OTD, OTR/L · Author of The Interoception Curriculum
Her work is what gave me the language for what I was seeing.
And here's the part most parents don't know:
Kelly Mahler didn't just inspire BrightKidCo from a distance — she actually worked directly with the founder, Mary S., to help shape the mechanism and test it with real families before it ever launched.
As they put it: "We didn't invent the science. We just figured out how to wear it."
During week three, Eli stopped mid-play. Looked down. Noticed he was wet. In three years, that had never happened.
I cried in the kitchen.
Not because he'd "done it" — he hadn't, not yet.
Because for the first time in three years, I had proof that his brain could feel it.
That the connection wasn't permanently broken. That it was buildable.
That we weren't, as I'd genuinely started to believe, going to be in pull-ups forever.
Two weeks later he told me before he had to go.
Caleb followed about a month behind, faster than Eli — Level 1 versus Level 3 — but the same trajectory.
Pause. Notice. Connect. Tell.
It wasn't a 3-day method. It wasn't dramatic. It was slow. Calm. The way I think both of them had needed it to be the entire time.
I'm not the only one.
Over 100,000 autism families have already made the switch.
Here's a handful of moms whose stories sounded a lot like mine:
Jessica R.
"The biggest change we saw was awareness. Instead of ignoring accidents like she did with pull-ups, the wet sensation is noticeable enough that she reacts immediately. That learning moment — that little pause — is everything."
Phoenix, AZ
Amanda K.
"He stopped melting down over the 'diaper' feeling. These feel like real underwear, and the 'uh-oh' moment is gentle — not harsh. Less panic. More routine. He's never going back to pull-ups."
Columbus, OH
Danielle H.
"After 18 months of ABA, my son would only go when prompted. Pull-ups kept him so dry that nothing 'connected' on his own. With these, he started pausing and looking down — that tiny pause was HUGE for us."
Seattle, WA
Stephanie D.
"If you're already burnt out, constant full-outfit accidents will break you. These reduced the big messes while still giving the learning signal. Six weeks in, he started taking my hand and walking toward the bathroom. I still can't believe it."
Charlotte, NC
Questions other moms have asked me.
I get a lot of messages now.
These are the ones that come up the most:
Is this just another "training pant"? I've tried those before and they didn't do anything.
My son doesn't seem to mind being wet at all. How would feeling wet teach him anything?
My kid is older / non-verbal / Level 3. Will this even work for us?
My BCBA has a whole protocol. Won't this conflict with what we're already doing?
I've already wasted so much money on stuff that didn't work. Why is this different?
How long until I see something change?
About the brand behind the underwear.
Founded by Mary S. · Mom of three
BrightKidCo wasn't built in a lab or by a marketing team.
It was built at a kitchen table in Texas by Mary S. — a mom of three boys, including one on the spectrum — after years of being stuck in the same place I was.
She designed the underwear with input from OTs and BCBAs because nothing on the market did what her son needed.
Kelly Mahler herself was part of that process — helping shape the mechanism and field-testing it with families before it ever went to market.
Nobody asked me to write this. I wrote it because no one wrote it for me when I needed it.
You don't have to know if it works yet.
Try BrightKidCo for 60 days. If your child shows no movement toward awareness — every penny back.
No return-shipping fights. No process. No guilt.
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Potty Training Underwear Designed for Autistic Kids
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- Body-Signal Learning Layer™ — the gentle sensory feedback pull-ups engineer away. The input their brain needs to start building the connection.
- Sensory-safe soft cotton — no harsh tags, no stiff seams, no crinkle sound. Accepted by children who reject every other training underwear.
- Leak-resistant outer barrier — accidents contained. School, therapy, outings possible again.
- Calibrated sensation — not overwhelming — gentle enough for sensory-sensitive systems. Noticeable enough to trigger awareness.
- Real underwear feel, no diaper bulk — supports the transition without sensory overwhelm.
- 100% hypoallergenic cotton · PFAS-free · BPA-free · Made in the USA
- 60-Day Calm Progress Guarantee™ — no movement toward awareness in 60 days: full refund. No process. No guilt.
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