When Sempi was a little baby we had a hard time putting him to sleep. I would rock him for hours (yup, hours) trying to get him to sleep. During those days I would sing a Tamil song that my mom taught me in the hopes that it'll calm him down and put him to sleep. Never worked.
With Vian we are going through a similar experience (you'd think we'd learn by now) of rocking him to sleep. But this time when I sing that Tamil song he actually calms down. He stops crying, places his head on my chest while I rock him and sometimes even falls asleep. This of course brings me tremendous joy. I was patting myself on the back congratulating for perfecting my singing technique.
Only to find out later that he also calms down (faster) if the vacuum cleaner is in use. Yoshi found this out accidentally while vacuuming the house while wearing him in a wrap. He was passed out in under 5 minutes flat.
My son likens my singing to the sound of a vacuum cleaner. I'm beaming with pride.