If you run or do yoga, you obviously know about the endorphins.
Yes, they are basically the same thing as smoking crack.
Last time I checked, crack addiction was uncool.
So, if you're preparing to post a Facebook status update about running or yoga, ask yourself the following fundamental question:
IF I JUST SMOKED SOME CRACK, WOULD I BE BRAGGING ABOUT IT?
No, you probably wouldn't.
But if you did just smoke a giant crack rock, and you did decide to brag about it on Facebook, you are awesome. Ain't nothin' gonna keep you down!
ADDENDUM: People also could start posting whenever they get laid: "I just had sex for 3.7 minutes! So awesome!"