I think it's the culture/genes they were brought/born into. Because it can be genetically made into your DNA or you might be raised in that certain household/culture that you're used to.
Explanation:
I say they share some similarities due to history and being close to each other.
Explanation:
It is a traditional form of courtship music in which a man woos a woman by singing underneath her window at night. It is widely practiced in many parts of the Philippines with a set of protocols, a code of conduct, and a specific style of music.
