Song Stuck in My Head

Why can’t I get normal songs stuck in my head? I’ve never had the “It’s a Small Small World Song.” I get “Bohemian Rhapsody.” I get whistling from “Andy Griffith.” Last night I went to I am Cow. It took all of 3 minutes for my brain to be permanantly seared. I woke up this morning singing it. I am Cow, Hear Me Moo.