Listen to EGO TRIPPING AT THE GATES OF HELL by The Flaming Lips.
A few weeks ago I rode my bike out to Staten Island (via the ferry of course). Since I was alone, I brought along my headphones and listened to tunes while I tooled around. You know how sometimes a song just clicks with you? I got to Ego Tripping..., and all of a sudden, a song I had heard a dozen times over the years, it was like I had new ears and was hearing it for the first time. And then the second, then the fifth, then the eighth--I just stuck it on repeat and listened to it for an hour straight! And it was really nice, almost euphoric.
It's funny how our brains work right? I definitely think our minds get old and stop working right, just like the rest of us. My mind is at least! Senescence starts a long time before senility. But it won't really matter as long as your mind's sharp enough and dynamic enough to have nice little experiences with music (and books, and people, and all that)