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What obvious adult discoveries made you feel a bit of a plonker?

687 replies

Airconfan · 21/09/2026 00:36

What’s something you learnt as an adult that made you think that’s completely obvious and yet I have never considered that….i feel like a bit of a plonker?

Mine was when taking tablets, the more you drink with it the better it will dissolve. I think alot of tablets are testing with the assumption people will drink 250ml alongside it.

OP posts:
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11
Mo819 · Yesterday 21:25

justinhawkinsnavalfluff · 21/09/2026 06:57

Mind blown! 🤯

I didnt know that until right now.

EBearhug · Yesterday 21:33

SabreIsMyFave · Yesterday 16:57

AND I only found out recently that the little arrow near the fuel gauge, (next to the petrol pump icon,) indicates which side the petrol cap is on! Went over 50 years without knowing this! 😆

Not all cars, though, so it's not unreasonable not to know this.

EBearhug · Yesterday 21:35

AlliuminBloom · Yesterday 18:27

That chips/fries are just fried potatoe sticks. I thought they were mash with some sort of coating, a bit like croquettes. I had only ever seen them cooked from bags of frozen fries.

They often do have a coating. My coaeliac sister can rarely have chips if we go out, because so many places use a flour coating to make them crispier on the outside, and then they aren't gluten-free.

Merrybandofpirates · Yesterday 21:55

Takethehuntingquiche · Yesterday 20:12

"On a ks (or superking) then you put the longer side of the duvet horizontally across the bed (snuggled up to the fasteners). Mind blown."
This says that the correct way to put the duvet in the cover is to have the long side against the fasteners though? Which can't be right, surely

You really don’t understand what’s being said and I cannot be bothered explaining it. She has the cover oriented correctly on the bed with the fastenings at the foot. She just had the duvet inside the cover the wrong way. She has now figured out how to out the duvet into the cover correctly. Absolutely nothing o do with having the fastenings at the side.

Thegirlwhowent · Yesterday 22:02

ThreeMogsAndCounting · Yesterday 19:33

Often duvets have the filling sewn in horizontally so you don't end up with big lumps at one end or t'other, so you can use the orientation of the sewing to assist you

I can't cope with king size duvets. I have double size, and double duvets are square so it doesn't really matter if you put them in the wrong way.

Thegirlwhowent · Yesterday 22:04

Takethehuntingquiche · Yesterday 20:12

"On a ks (or superking) then you put the longer side of the duvet horizontally across the bed (snuggled up to the fasteners). Mind blown."
This says that the correct way to put the duvet in the cover is to have the long side against the fasteners though? Which can't be right, surely

I think king or super king duvets are wider than they are long.

scalt · Yesterday 22:29

Are chickens specifically female? I thought the females were hens, and the males were cocks.

Who knows the word for a male bee? Hint: the meaning most people are familiar with is a remote controlled aircraft.

EvieBB · Yesterday 22:37

Hatty65 · Yesterday 17:48

I learned from Mumsnet WELL into my 50s that I was putting my KS duvet into the cover the wrong way round. I had had a king sized bed for 30 years...

I always assumed that all beds are longer from headboard to foot and that therefore the duvet's shorter side snuggles up against the poppers/buttons.

No. Apparently not. On a ks (or superking) then you put the longer side of the duvet horizontally across the bed (snuggled up to the fasteners). Mind blown.

No wonder I always had a flappy bit of empty duvet cover and it didn't lie flat.

Omg.....I never knew that either! Thanks for posting this!! 😀🙏🏼

EvieBB · Yesterday 22:38

CombatBarbie · Yesterday 18:19

Come on now....how many of us read instructions that in dept.... in fact how many read instructions (directed at mainly men)

Edited

Omg! No I never knew this!

hewasflirtingwithbeverleymacca · Yesterday 22:50

Anarchy99 · 21/09/2026 02:47

That, despite a comprehensive education, women don’t piss out of their vaginas. And yes I am a woman.

🤣🤣🤣

hewasflirtingwithbeverleymacca · Yesterday 22:55

When I was a child I thought it was “Simple Simon met a python”. It was only when I was in my thirties that I found out it was a pieman!🤦🏽‍♀️

noodlezoodle · Yesterday 23:22

MrsDanversGlidesAgain · Yesterday 19:41

Mallorca and Majorca are the same place. Spanish speaking friend kindly enlightened me (after she'd stopped laughing).

This only dawned on me in the last few years when I started learning Spanish Grin
I think I was also confused because there's a Menorca. So I thought there was a little group of three islands.

EvieBB · Today 06:36

noodlezoodle · Yesterday 23:22

This only dawned on me in the last few years when I started learning Spanish Grin
I think I was also confused because there's a Menorca. So I thought there was a little group of three islands.

Thank you - just learned something new today! Hahahaha

trumpredcard · Today 07:42

Thegirlwhowent · Yesterday 18:50

I'm one of those people who always reads instructions but I've had my car for 5 years and discovered only this summer that it's got heated seats! And I still don't know how to connect the Bluetooth stuff. Just today, I found a secret storage area I didn't know existed. Sometimes instruction booklets are just too long and complicated.

I was told by my petrolhead ds, that any feature in a car that is not used within the first five months...will never usually be used.

ArcangelaTarabotti · Today 07:47

trumpredcard · Today 07:42

I was told by my petrolhead ds, that any feature in a car that is not used within the first five months...will never usually be used.

I don’t bother to read the manual for my car. 20mph speed limits were imposed locate sand like lots of people was caught out by it.
Went in a speed awareness courses where the trainer told us about the speed limiter on the driving wheel stalk. Simple to use and I now routinely use it always.

TwinklySquid · Today 08:00

My geography is bad but I thought Budapest and Bucharest were the same place. I thought people just pronounced it differently 🙃

Thegirlwhowent · Today 08:06

trumpredcard · Today 07:42

I was told by my petrolhead ds, that any feature in a car that is not used within the first five months...will never usually be used.

True. But I will definitely use the heated seats!

trumpredcard · Today 08:12

@Thegirlwhowent I too found a secret storage drawer (under the front passenger seat) when searching for a parking ticket that had fallen off the dashboard yet wasn't in the footwell. I had had the car for six years by then.

Takethehuntingquiche · Today 08:21

Thegirlwhowent · Yesterday 22:04

I think king or super king duvets are wider than they are long.

No, they are longer than they are wide. Just like the bed itself

stickygotstuck · Today 09:01

TheDutchHouse · Yesterday 08:07

Hiding head in shame as I type lol
But years ago I used to think that if you cut and pasted on your mobile using your finger , you must use the same finger to paste as it was somehow on your finger !
it took someone seeing me do this to realise!

Love this!

It may be wrong, but it just makes a lot of sense! 😊

twothingscanbetrue · Today 09:12

Takethehuntingquiche · Today 08:21

No, they are longer than they are wide. Just like the bed itself

@Takethehuntingquiche @Thegirlwhowent maybe this would help?

What obvious adult discoveries made you feel a bit of a plonker?
JeatherLacket · Today 09:30

ArcangelaTarabotti · Today 07:47

I don’t bother to read the manual for my car. 20mph speed limits were imposed locate sand like lots of people was caught out by it.
Went in a speed awareness courses where the trainer told us about the speed limiter on the driving wheel stalk. Simple to use and I now routinely use it always.

Can you explain about the speed limiter, is that something different to cruise control?

dreamingofgoodhair · Today 09:43

LunaMay · Yesterday 13:05

The funniest conversation i ever had was my mum and i educating my nan on anal sex and blow jobs etc. 70 years old ans she'd had no idea!

Can’t imagine having that conversation with either of my nans 😳

x2boys · Today 09:55

dreamingofgoodhair · Today 09:43

Can’t imagine having that conversation with either of my nans 😳

Me either or my mother!