How do u keep up with jokes???

My friends were like YO WHAT ARE THOSE?!?! looking at my new brandy shoes 

But I couldnt get the joke so I googled on google and there was this new vine video that became trend! 

How the hell do I keep up with new jokes my god I feel Ssooo old... crying...

[행1]

lol I totally understand you
My friend once told me a joke about the world's smallest violin playing and I was like um.. okay.. ㅇ_ㅇ <-probably with this facial expression
then like few months later I was so into Demi Lovato and watching her videos where she did the same joke
Me, not remembering the joke that my friend did, told the same friend exactly same joke and she was like yeah, I told you that months ago and you weren't into it that time

[행2]

No you are not old.. Just you dont care about:))

[행3]

lol I feel you. I just learned what smh stands for...