I'm almost 40 but it's like my brain stopped at 25-27 and I think I'm super young still. then you talk to someone in their 20s and they've never seen the matrix or some other classic film and I'm like shit , I am a boomer to these people  

 As you age, you'll find out that old is always a little bit older than you are, no matter how old you get.  It might change if you get past 90 or 100, but otherwise, it is always someone else that is old.