sharing itunes

So my aunt and uncle have an Imac. Sometimes she downloads songs that my uncle wants. They both have diff accounts on the imac. How or what would be the easiest way to share the itunes songs.

I accidentally did something where I go to spotlight and I can type in a song on my uncles playlist and it copies it over to my itunes which is weird? But all he wants to do is grab music from his account from my aunts. But it is all locked. They both have file sharing on and I am confused.

There's an article on the Apple Support pages that might help - iTunes: How to share music between different accounts on a single computer

Thanks! Worked like a charm.