Sticky Music

I'm still on winter break and not quite focused, so pardon my continuing obsession with The Shins. Let's see if we can get a little reflection going anyway.  Question:  what makes their music so damned sticky?!  I adored the song below (from Chutes Too Narrow) the very first time I heard it. This morning I woke up literally hearing it.  What gives, and why is it that so many Shins songs are so