I'm spinning yarn for a friend's order for baby booties and I caught myself singing a song absentmindedly. Ack...you know the ones that stick in your head and you can't get rid of them. Maybe it was the last song you heard, or one that's hung around for years.
I think it is interesting to listen to what others are whistling or humming...they usually give up some secret feeling they are having. Like when I'm running around from school to school and store to bank, I tend to belt out "I am Woman Hear Me Roar!" When I'm cleaning the house or grocery shopping out pops "Stand By Your Man!" It makes me laugh when I realize what I'm singing standing in the cereal aisle. I hum "Moon River" a lot and recently discovered it had been the one my Granddad sang throughout his life so that one feels like a little gift.
The alpacas hum to soothe themselves or comfort each other, or to call their babies. Sometimes it has more of an anxious tone. You know I'm leading up to the alpaca ringtone I made recently. :) Here is the link for your personal use or to just listen to what they sound like: Alpaca Ringtone.
My favorite tune of all time is "Greensleeves". I can thank my mom for that one. Here is a link to a beautiful version on the Lute: Greensleeves with Luca Pianca . I bet we could make a ringtone out of that one, too!
One last note...songs can be used for sibling torture. My son LOVES to irritate his sister with that Justin Bieber song. He just has to sing the first few words (Baby, baby, baby, oh) and she is running from the room.