Angelina Jolie reportedly has a "deep need" to help others.
The actress, who raises six children with her partner Brad Pitt, is renowned for her charity work.
A source told Grazia: "Angelina sees so many children suffering and she makes a point of bonding with each child she meets, so it's natural she wants to bring some of them home with her.
"She has this deep need to save the world."
The new co-ordinates that Jolie has had tattooed on her arm match Shawnee in Oklahoma, where Pitt was born.
It is thought that this is why she chose the permanent marking, although the star has not confirmed this.
Another insider explained: "That tattoo is her way of saying they'll always be tied together."
Jolie, who is a goodwill ambassador, made a public plea this week for increased aid for those affected by the current political conflict in Libya.
The actress, who raises six children with her partner Brad Pitt, is renowned for her charity work.
"She has this deep need to save the world."
The new co-ordinates that Jolie has had tattooed on her arm match Shawnee in Oklahoma, where Pitt was born.
It is thought that this is why she chose the permanent marking, although the star has not confirmed this.
Another insider explained: "That tattoo is her way of saying they'll always be tied together."
Jolie, who is a goodwill ambassador, made a public plea this week for increased aid for those affected by the current political conflict in Libya.
