Having a tune stuck on loop in your head really highlights how programmable we are.

Whenever a song gets stuck in my head and I find myself subconsciously whistling or singing it on a loop I can't help but wonder what other subconscious loops have been programmed in to me that I do not realise.

How many thoughts have been put in to my mind that go round and round without me ever being concious of it because they have no physical manifestation such as the whistling to draw my attention to them?