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25 Things Considered “Common Knowledge” People Didn’t Learn Until Embarrassingly Late In Life

When you’re a kid, you think adults know everything. Then you grow up and realize everyone’s just sort of making things up as we go.

People are discussing common knowledge that they found out embarrassingly late in this AskReddit Thread. See how many of these you already knew.

What is common knowledge that you found out way too late?

u/Big_Piccolo_8369


1.

Percentages are reversible. So 8% of 25 is the same thing as 25% of 8 and sometimes the reverse is easier to calculate.

CheekyOnion64

2.

Being well-educated in one area doesn’t mean that a person can’t be a total idiot in other areas.

Red-belliedOrator

3.

Tell the police nothing.
Tell the paramedic everything.

Accurate_Leg_2447

4.

Taking medication for mental illness actually helps

IceCreamDream10

5.

Don’t ignore bullies. That’s terrible advice.

The only way they will leave you alone is through the sight of their own blood.

DillyDoobie

6.

Always get it in writing.

GKnives

7.

You can’t get lazy with birth control just because you turn 40.

Signed, Middle Aged Mom of a newborn

KayaXiali

8.

Flushable wipes are not to be flushed ever.

Mysterious_Valuable1

9.

The people you work with aren’t your friends. Always keep your guard up. Any and all of them can throw you under the bus at any time.

rrickitickitavi

10.

Just because I hold an opinion on something doesn’t mean that I need to share it. I spent WAY too much of my early adulthood inserting my viewpoint into discussions that I wasn’t really a part of.

xjuggernaughtx

11.

When it comes to trying to save someone from addiction: love is not enough.

Loot_my_body

12.

That most people can actually see pictures in their minds. Growing up, I always thought ‘counting sheep to fall asleep meant using my head to think the words “1 sheep, 2 sheep, 3 sheep” etc, and so I was understandably puzzled as to why sheep, and not any other word?

Then, when I was 34 years old, so not exactly young, I actually figured out that I have aphantasia.

Turns out, nearly everyone can actually ‘see’ animals, or their family member’s faces, or characters from a movie, in their head – whereas I’ve always built quite detailed descriptions, in words, because that’s all I have in my head.

NegativeFunk

13.

Just because they’re older than you, doesn’t make them more mature. Would’ve saved me from an entire marriage

Ok_Chocolate3253

14.

If you press Windows Key + V you can see a list of all the things you’ve copied

btween3n20chars

15.

“This little piggy went to market”…the pig was not shopping.

jerseycityfrankie

16.

It is possible to commit no mistakes and still lose. That is not a weakness. That is life.

Fifetwo

17.

Never make an important decision if you are hungry or horny.

Both have a massive impact on your decision-making abilities.

Ill-Appointment6494

18.

That common sense is not that common

OutrageousRhubarb853

19.

Saving money early in life is a really good idea.

Bomphilogia

20.

That you can actually say no to your parents.

EmperorZurg14

21.

That gargling saltwater works way better than cough drops for colds and sore throats.

Nimbous

22.

No one really cares about you. I don’t mean that in a bad way. But everyone is so busy thinking about themselves, that you are always an afterthought.

The most embarrassing thing in your life probably doesn’t matter than much to someone else.

yesIdofloss

23.

Your brain isn’t trying to make you happy or your life easier.

It’s trying to keep you alive. Everything else is secondary.

RelentlessSA

24.

Apparently, you’re not supposed to rinse off your toothpaste.

Edit: Just Google it. Apparently, it’s better to leave the toothpaste residue in your mouth so the fluoride can work on your teeth.

Alberwyne

25.

Your oral health is just as important as your general health.

SuvenPan