A kid is playing a video game...

A kid is playing a video game in his room when his mom walks in and says, "Honey, come meet my new boyfriend!"

Without taking his eyes off the screen the kid says, "I'm right in the middle of this game; tell him to come in here!"

A minute later her boyfriend walks in and says, "Hey, Champ! How you doing?"

The kid ignores him.

"Don't like 'Champ', huh? That's fine. How about BlueDragon72?"

The kid bolts upright, turns and says, "BlueDragon72? I haven't used that name since I played Call of Duty when I was ten."

And the boyfriend says, "That's right, dude. I told you I was gonna bang your mom."

[-]

I keep waiting for the wave of posters saying that they first heard this one in the '70's or '80's.

/u/perry649 has unlocked an opportunity for education!

Abbreviated date-ranges like "’90s" are contractions, so the apostrophe goes before the numbers.

You can also completely omit the apostrophe if you want: "The 90s were a bit weird."

Numeric date-ranges like 1890s are treated like standard nouns, so they shouldn't include apostrophes.

To show possession, the apostrophe should go after the S: "That was the ’90s’ best invention."

The apostrophe should only precede the S if a specific year is being discussed: "It was 1990's hottest month."

TL;DR: When writing dates, apostrophes do not pluralize!

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