It's probably because she isn't even arabic.
Honestly, these pornos kind of annoy me. I'm not sensitive about race or anything, but why would she keep the scarf on?
it's because it makes them look more arabic...which i guess is ok since they are trying to appeal to people, and arabs do look relatively diverse (aka, they could be confused as mexicans, black, or sometimes even white, like me. I'm the whitest arab alive).