Weird beginnings in ayu's songs

[alternarist]

I find that some of ayu songs have extremely weird beginnings and it totally didnt fit into the song at all. One example is Will. The song began with the sound of something being sucked from a tube and then the traditional instrument comes in.

For kiss o' kill, the song began with something that sound like African tribes singing. it doesnt fit the song that is so impactful.

Are you guys aware if those weird beginnings signify anything? XD