I'm not sure how my wife puts up with it, but whenever I'm bored, walking, or even sitting in the car, for some unknown reason, I start to hum and it is always the same tune. I guess I have a connection with one Beaky Buzzard! ("I'm bringing home a baby bumble bee...")
I loved Beaky Buzzard and he is still one of my favorite characters on Looney Tunes, but for some reason this one cartoon and one tune stuck in my head more than any other. So if you are ever in the car with me, and hear me start to hum, I'm so sorry, because at this point in my life I don't even realize I am doing it.
I guess it is like some people with sucking their thumbs or playing with their hair, I hum and hum while thinking about Beaky Buzzard.