This has been in my head for a few days now.
...sorry it's not as silly or light as the others
Your brain doesn't seem to care.
I think the natural state of a healthy brain is, by default, trying to learn everything it can. An "earworm" is at its core, a healthy brain trying to learn something.
Adding additional connections (like that clip) makes the brain even more curious.
I suspect that one of the brain's "involuntary reactions" to stimuli is to repeat the stimulus over and over until it has burned synaptic pathways sufficient enough to repeat the pattern at will. (this is just a stupid theory of mine
There are no connections between what we find pleasing, and what the brain finds that it must create synaptic pathways for.
Hit me in my knee and my leg jerks. I still don't like it. LOL