10 is average for an adventuring hero. Not necessarily for most "civilians" if you want to call them that.

Eh, a ten will give you about a 50/50 roll if something is "easy," and only about a 25% chance if something is "medium" difficulty. Sounds about right for me. Am I gonna shut my damn mouth when I should? 75% of the time, no.

Incorrect. Commoner is all 10s 

Hey baby

Intelligence is knowing tomatoes are a fruit Wisdom is knowing never to add it to a fruit salad

"Charisma is a sex appeal" is funny, but that's not really entirely accurate. It's about motivating others towards your goals whatever that may be, having a presence that commands attention and being a good communicator. That's why charisma helps disparate skills like lying, persuading, intimidating, and performing. Sex appeal may superficially help some of those things, but so does a half-giant that makes you piss yourself with their mere presence, or an old fat guy who speaks with clarity of conviction and intelligence. Ain't nobody want to fuck Winston Churchill, and he was an asshole as well. But he was a very charismatic figure, still.

Constitution is when you have to eat the fruit salad and there's tomatoes in it.

But the little cherry tomatoes rock in fruit salad!

What about fruit salad in a tomato?

Charisma is being able to sell a tomato-based fruit salad. That's how we got salsa.

I was more a 00's kid into consoles, so this was introduced to me via Fallout 3, then Dark Souls

Charisma is framing salsa as a tomato-based fruit salad

Dex is clearly green though

Int is knowing what you're talking about Wis is knowing when to talk Cha is when people listen to you

5e commoners are 10 across the board.

My Constitution is 0.

How charisma works: just say "hey baby". you're all welcome

Charisma is essentially Social Skills. Social Skills definitely help you get laid, but also convince a shopkeeper to give you a discount, persuade a guard to look the other way, etc.

One of the things I liked about the Chronicles of Darkness system is it cleared this up nicely. Stats were in a 3x3 grid. One axis was physical, mental, social The other was Power, Finesse, Resistance. Want to shove something? Physical + Power. That's strength. Want to figure out a riddle? Mental + Finesse. That's Dexterity. Command attention? Social + Power. That's the Presence stat. Lie and misdirect? Social + Finesse. Stat was called Manipulation. Now you can have a character that's commanding without also being a natural liar and flirt. DND doesn't help let you do that because the concepts are bundled together into a single stat. (You could invest separately into like Expression for making speeches and Deception for lying, of course) Humans are rated 1 to 5, where a 5 is the peak of human capability. Presence 5 is like AAA movie stars and great leaders. Of course, if you add supernaturals to your game a starting chump vampire could have **seven** presence if they take Majesty as their power, and become a nearly irresistible magnet of attention.

I have never seen Intelligence contrasted with Wisdom in a way that felt fitting. Does an intelligent person not know when not to speak?